Updated on 2024/07/12

写真a

 
Nakao Ken-ichi
 
Organization
Graduate School of Science Department of Physics Professor
School of Science Department of Physics
Title
Professor
Affiliation
Institute of Science

Position

  • Graduate School of Science Department of Physics 

    Professor  2022.04 - Now

  • School of Science Department of Physics 

    Professor  2022.04 - Now

Degree

  • PhD ( Hiroshima University )

Research Areas

  • Natural Science / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics

Research Interests

  • Gravity

  • General Relativity

  • Cosmology

  • Gravity

  • Cosmology

  • General Relativity

Research subject summary

  • 宇宙では地球上で実現できない程の高エネルギー、高密度、その反対の高真空における物理現象が頻繁に起こります。それゆえ宇宙を観測することを通して我々の知る物理法則をさらに高いレベルで検証し、より予言能力の高い新しい物理法則を見出すことができると考えられています。地球上の物理現象でも重力は重要なのですが、宇宙の物理現象においてはその比ではないほど重要な役割を担います。これは宇宙における物理現象の際立った特徴の一つです。重力といえばニュートンの万有引力の法則が有名ですが、この物理法則は、重力が極めて強い現象に関する予言能力が低く、一方アインシュタインが提案した重力理論である一般相対性理論は、強重力の物理現象に対して高い予言能力を持つと考えられています。時間と空間をまとめて時空と呼びますが、一般相対性理論では重力をこの時空の曲がりが原因で生まれる見かけの力であると考えます。この理論において重力は時空の幾何学なのです。そして、我々の宇宙がとても奇妙で興味深い時空構造を持つことをこの理論は予言します。例えば、ブラックホールやビッグバンです。私はこの一般相対性理論に基づいて様々な宇宙の物理現象に関する理論的な研究を行っています。最近の研究テーマは、ブラックホールとその周辺、時空特異点、重力波の理論的な研究、相対論的宇宙モデル等です。

Research Career

  • Formation of Spacetime Singularities

    general relativity, spacetime singularity, gravitational collapse  Individual

    1995.04 - Now 

  • Black hole shadow

    2018.04 - Now 

  • Inhomogeneous Universe Model

    cosmology, distance-redshift relation, gravitational lens  Individual

    1994.04 - Now 

  • Early Universe

    Inflationary universe model, cosmic no hair conjecture, de Sitter spacetime  Individual

    1987.04 - Now 

  • Gravitational Interaction of Topological Defects

    domain wall, general relativity, black hole  Individual

    1900.04 - Now 

Professional Memberships

  • 日本物理学会

      Domestic

  • International Society on General Relativity and Gravitation

      Overseas

  • 日本天文学会

      Domestic

  • 日本物理学会

  • 日本天文学会

  • 「一般相対論と重力」国際学会

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Committee Memberships (off-campus)

  • 委員   素粒子奨学会  

    2021.04 - Now 

  • 第76期代議員   日本物理学会  

    2020.03 - 2021.03 

  • vice-representative of cosmic ray/astrophysics field   The Physical Society of Japan  

    2019.04 - 2020.03 

  • 第75期代議員   日本物理学会  

    2019.03 - 2020.03 

  • vice-representative of cosmic ray/astrophysics field   The Physical Society of Japan  

    2018.04 - 2019.03 

  • 第74期代議員   日本物理学会  

    2018.03 - 2019.03 

  • 第73期代議員   日本物理学会  

    2017.03 - 2018.03 

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Awards

  • 日本物理学会論文賞受賞

    1998  

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    Country:Japan

  • PRD Editor's Suggestion

    2019.02  

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    Country:United States

  • PRD Editor's Suggestion

    2019.02  

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    Country:United States

  • 日本物理学会論文賞受賞

    1998  

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    Country:Japan

Job Career (off-campus)

  • Osaka Metropolitan University School of Science Department of Physics

    2022.04 - Now

  • Kyoto University   Graduate School of Science   Assistant Professor

    1994 - 1999

  • Kyoto University   Graduate School of Science   Assistant Professor

    1994 - 1999

Education

  • Hiroshima University   Physics   The second semester of doctoral program   Graduated/Completed

    - 1991

  • Aichi University of Education     Graduated/Completed

    - 1986

Papers

  • Relativistic orbits of S2 star in the presence of scalar field Reviewed

    Bambhaniya P.

    European Physical Journal C   84 ( 2 )   2024.02( ISSN:14346044

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1140/epjc/s10052-024-12477-3

  • Radiative gravastar with thermal spectrum: Sudden vacuum condensation without gravitational collapse Reviewed

    Nakao K.I.

    Physical Review D   107 ( 8 )   2023.04( ISSN:24700010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.107.084036

  • Radiative gravastar with Gibbons-Hawking temperature Reviewed

    Nakao K.I.

    Physical Review D   106 ( 10 )   2022.11( ISSN:24700010

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.106.105006

  • Robustness of particle creation in the formation of a compact object Reviewed

    Progress of Theoretical and Experimental Physics   2022.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Current status of space gravitational wave antenna DECIGO and B-DECIGO Reviewed

    Kawamura Seiji, Ando Masaki, Seto Naoki, Sato Shuichi, Musha Mitsuru, Kawano Isao, Yokoyama Jun'ichi, Tanaka Takahiro, Ioka Kunihito, Akutsu Tomotada, Takashima Takeshi, Agatsuma Kazuhiro, Araya Akito, Aritomi Naoki, Asada Hideki, Chiba Takeshi, Eguchi Satoshi, Enoki Motohiro, Fujimoto Masa-Katsu, Fujita Ryuichi, Futamase Toshifumi, Harada Tomohiro, Hayama Kazuhiro, Himemoto Yoshiaki, Hiramatsu Takashi, Hong Feng-Lei, Hosokawa Mizuhiko, Ichiki Kiyotomo, Ikari Satoshi, Ishihara Hideki, Ishikawa Tomohiro, Itoh Yousuke, Ito Takahiro, Iwaguchi Shoki, Izumi Kiwamu, Kanda Nobuyuki, Kanemura Shinya, Kawazoe Fumiko, Kobayashi Shiho, Kohri Kazunori, Kojima Yasufumi, Kokeyama Keiko, Kotake Kei, Kuroyanagi Sachiko, Maeda Kei-ichi, Matsushita Shuhei, Michimura Yuta, Morimoto Taigen, Mukohyama Shinji, Nagano Koji, Nagano Shigeo, Naito Takeo, Nakamura Kouji, Nakamura Takashi, Nakano Hiroyuki, Nakao Kenichi, Nakasuka Shinichi, Nakayama Yoshinori, Nakazawa Kazuhiro, Nishizawa Atsushi, Ohkawa Masashi, Oohara Kenichi, Sago Norichika, Saijo Motoyuki, Sakagami Masaaki, Sakai Shin-ichiro, Sato Takashi, Shibata Masaru, Shinkai Hisaaki, Shoda Ayaka, Somiya Kentaro, Sotani Hajime, Takahashi Ryutaro, Takahashi Hirotaka, Akiteru Takamori, Taniguchi Keisuke, Taruya Atsushi, Tsubono Kimio, Tsujikawa Shinji, Ueda Akitoshi, Ueda Ken-ichi, Watanabe Izumi, Yagi Kent, Yamada Rika, Yokoyama Shuichiro, Yoo Chul-Moon, Zhu Zong-Hong

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   2021 ( 5 )   2021.05( ISSN:2050-3911

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/ptep/ptab019

  • Do black hole shadows merge? Reviewed

    Okabayashi Kazumasa, Asaka Nobuyuki, Nakao Ken-ichi

    PHYSICAL REVIEW D   102 ( 4 )   2020.08( ISSN:1550-7998

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevD.102.044011

  • Application of independent component analysis to the iKAGRA data Reviewed

    Akutsu T., Ando M., Arai K., Arai Y., Araki S., Araya A., Aritomi N., Asada H., Aso Y., Atsuta S., Awai K., Bae S., Bae Y., Baiotti L., Bajpai R., Barton M. A., Cannon K., Capocasa E., Chan M., Chen C., Chen K., Chen Y., Chu H., Chu Y-K, Craig K., Creus W., Doi K., Eda K., Eguchi S., Enomoto Y., Flaminio R., Fujii Y., Fujimoto M-K, Fukunaga M., Fukushima M., Furuhata T., Ge G., Hagiwara A., Haino S., Hasegawa K., Hashino K., Hayakawa H., Hayama K., Himemoto Y., Hiranuma Y., Hirata N., Hirobayashi S., Hirose E., Hong Z., Hsieh B. H., Huang G-Z, Huang P., Huang Y., Ikenoue B., Imam S., Inayoshi K., Inoue Y., Ioka K., Itoh Y., Izumi K., Jung K., Jung P., Kaji T., Kajita T., Kakizaki M., Kamiizumi M., Kanbara S., Kanda N., Kanemura S., Kaneyama M., Kang G., Kasuya J., Kataoka Y., Kawaguchi K., Kawai N., Kawamura S., Kawasaki T., Kim C., Kim J. C., Kim W. S., Kim Y-M, Kimura N., Kinugawa T., Kirii S., Kita N., Kitaoka Y., Kitazawa H., Kojima Y., Kokeyama K., Komori K., Kong A. K. H., Kotake K., Kozakai C., Kozu R., Kumar R., Kume J., Kuo C., Kuo H-S, Kuroyanagi S., Kusayanagi K., Kwak K., Lee H. K., Lee H. M., Lee H. W., Lee R., Leonardi M., Lin C., Lin C-Y, Lin F-L, Liu G. C., Liu Y., Luo L., Majorana E., Mano S., Marchio M., Matsui T., Matsushima F., Michimura Y., Mio N., Miyakawa O., Miyamoto A., Miyamoto T., Miyazaki Y., Miyo K., Miyoki S., Morii W., Morisaki S., Moriwaki Y., Morozumi T., Musha M., Nagano K., Nagano S., Nakamura K., Nakamura T., Nakano H., Nakano M., Nakao K., Nakashima R., Narikawa T., Naticchioni L., Negishi R., NguyenQuynh L., Ni W-T, Nishizawa A., Obuchi Y., Ochi T., Ogaki W., Oh J. J., Oh S. H., Ohashi M., Ohishi N., Ohkawa M., Okutomi K., Oohara K., Ooi C. P., Oshino S., Pan K., Pang H., Park J., Arellano F. E. Pena, Pinto I, Sago N., Saijo M., Saito S., Saito Y., Sakai K., Sakai Y., Sakai Y., Sakuno Y., Sasaki M., Sasaki Y., Sato S., Sato T., Sawada T., Sekiguchi T., Sekiguchi Y., Seto N., Shibagaki S., Shibata M., Shimizu R., Shimoda T., Shimode K., Shinkai H., Shishido T., Shoda A., Somiya K., Son E. J., Sotani H., Suemasa A., Sugimoto R., Suzuki T., Suzuki T., Tagoshi H., Takahashi H., Takahashi R., Takamori A., Takano S., Takeda H., Takeda M., Tanaka H., Tanaka K., Tanaka K., Tanaka T., Tanaka T., Tanioka S., San Martin E. N. Tapia, Tatsumi D., Telada S., Tomaru T., Tomigami Y., Tomura T., Travasso F., Trozzo L., Tsang T., Tsubono K., Tsuchida S., Tsuzuki T., Tuyenbayev D., Uchikata N., Uchiyama T., Ueda A., Uehara T., Ueki S., Ueno K., Ueshima G., Uraguchi F., Ushiba T., van Putten M. H. P. M., Vocca H., Wada S., Wakamatsu T., Wang J., Wu C., Wu H., Wu S., Xu W-R, Yamada T., Yamamoto A., Yamamoto K., Yamamoto K., Yamamoto S., Yamamoto T., Yokogawa K., Yokoyama J., Yokozawa T., Yoon T. H., Yoshioka T., Yuzurihara H., Zeidler S., Zhao Y., Zhu Z-H

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   2020 ( 5 )   2020.05( ISSN:2050-3911

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/ptep/ptaa056

  • How does a collapsing star look? Reviewed

    100 ( 8 )   084062-1 - 084062-27   2019.10( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.100.084062

  • Constant-mean-curvature slicing of the Swiss-cheese universe Reviewed

    51 ( 9 )   114-1 - 114-14   2019.09( ISSN:0001-7701

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1007/s10714-019-2596-0

  • Space gravitational-wave antennas DECIGO and B-DECIGO Reviewed

    Kawamura Seiji, Nakamura Takashi, Ando Masaki, Seto Naoki, Akutsu Tomotada, Funaki Ikkoh, Ioka Kunihito, Kanda Nobuyuki, Kawano Isao, Musha Mitsuru, Nakazawa Kazuhiro, Sato Shuichi, Takashima Takeshi, Tanaka Takahiro, Tsubono Kimio, Yokoyama Jun'ichi, Agatsuma Kazuhiro, Aoyanagi Koh-suke, Arai Koji, Araya Akito, Aritomi Naoki, Asada Hideki, Aso Yoichi, Chen Dan, Chiba Takeshi, Ebisuzaki Toshikazu, Eguchi Satoshi, Ejiri Yumiko, Enoki Motohiro, Eriguchi Yoshiharu, Fujimoto Masa-Katsu, Fujita Ryuichi, Fukushima Mitsuhiro, Futamase Toshifumi, Gondo Rina, Harada Tomohiro, Hashimoto Tatsuaki, Hayama Kazuhiro, Hikida Wataru, Himemoto Yoshiaki, Hirabayashi Hisashi, Hiramatsu Takashi, Hong Feng-Lei, Horisawa Hideyuki, Hosokawa Mizuhiko, Ichiki Kiyotomo, Ikegami Takeshi, Inoue Kaiki T., Ishihara Hideki, Ishikawa Takehiko, Ishizaki Hideharu, Ito Hiroyuki, Itoh Yousuke, Izumi Kiwamu, Kanemura Shinya, Kawashima Nobuki, Kawazoe Fumiko, Kishimoto Naoko, Kiuchi Kenta, Kobayashi Shiho, Kohri Kazunori, Koizumi Hiroyuki, Kojima Yasufumi, Kokeyama Keiko, Kokuyama Wataru, Kotake Kei, Kozai Yoshihide, Kunimori Hiroo, Kuninaka Hitoshi, Kuroda Kazuaki, Kuroyanagi Sachiko, Maeda Kei-ichi, Matsuhara Hideo, Matsumoto Nobuyuki, Michimura Yuta, Miyakawa Osamu, Miyamoto Umpei, Miyoki Shinji, Morimoto Mutsuko Y., Morisawa Toshiyuki, Moriwaki Shigenori, Mukohyama Shinji, Nagano Shigeo, Nakamura Kouji, Nakano Hiroyuki, Nakao Kenichi, Nakasuka Shinichi, Nakayama Yoshinori, Nishida Erina, Nishizawa Atsushi, Niwa Yoshito, Noumi Taiga, Obuchi Yoshiyuki, Ohishi Naoko, Ohkawa Masashi, Okada Kenshi, Okada Norio, Okutomi Koki, Oohara Kenichi, Sago Norichika, Saijo Motoyuki, Saito Ryo, Sakagami Masaaki, Sakai Shin-ichiro, Sakata Shihori, Sasaki Misao, Sato Takashi, Shibata Masaru, Shibata Kazunori, Shimo-oku Ayumi, Shinkai Hisaaki, Shoda Ayaka, Somiya Kentaro, Sotani Hajime, Suemasa Aru, Sugiyama Naoshi, Suwa Yudai, Suzuki Rieko, Tagoshi Hideyuki, Takahashi Fuminobu, Takahashi Kakeru, Takahashi Keitaro, Takahashi Ryutaro, Takahashi Ryuichi, Takahashi Hirotaka, Akiteru Takamori, Takano Tadashi, Tanaka Nobuyuki, Taniguchi Keisuke, Taruya Atsushi, Tashiro Hiroyuki, Torii Yasuo, Toyoshima Morio, Tsujikawa Shinji, Ueda Akitoshi, Ueda Ken-ichi, Ushiba Takafumi, Utashima Masayoshi, Wakabayashi Yaka, Yagi Kent, Yamamoto Kazuhiro, Yamazaki Toshitaka, Yoo Chul-Moon, Yoshida Shijun, Yoshino Taizoh

    INTERNATIONAL JOURNAL OF MODERN PHYSICS D   28 ( 12 )   1845001   2019.09( ISSN:0218-2718

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1142/S0218271818450013

  • First cryogenic test operation of underground km-scale gravitational-wave observatory KAGRA Reviewed International coauthorship

    Akutsu T., Ando M., Arai K., Arai Y., Araki S., Araya A., Aritomi N., Asada H., Aso Y., Atsuta S., Awai K., Bae S., Baiotti L., Barton M. A., Cannon K., Capocasa E., Chen C-S, Chiu T-W, Cho K., Chu Y-K, Craig K., Creus W., Doi K., Eda K., Enomoto Y., Flaminio R., Fujii Y., Fujimoto M-K, Fukunaga M., Fukushima M., Furuhata T., Hagiwara A., Haino S., Hasegawa K., Hashino K., Hayama K., Hirobayashi S., Hirose E., Hsieh B. H., Huang C-Z, Ikenoue B., Inoue Y., Ioka K., Itoh Y., Izumi K., Kaji T., Kajita T., Kakizaki M., Kamiizumi M., Kanbara S., Kanda N., Kanemura S., Kaneyama M., Kang G., Kasuya J., Kataoka Y., Kawai N., Kawamura S., Kawasaki T., Kim C., Kim J., Kim J. C., Kim W. S., Kim Y-M, Kimura N., Kinugawa T., Kirii S., Kitaoka Y., Kitazawa H., Kojima Y., Kokeyama K., Komori K., Kong A. K. H., Kotake K., Kozu R., Kumar R., Kuo H-S, Kuroyanagi S., Lee H. K., Lee H. M., Lee H. W., Leonardi M., Lin C-Y, Lin F-L, Liu G. C., Liu Y., Majorana E., Mano S., Marchio M., Matsui T., Matsushima F., Michimura Y., Mio N., Miyakawa O., Miyamoto A., Miyamoto T., Miyo K., Miyoki S., Morii W., Morisaki S., Moriwaki Y., Morozumi T., Murakami I, Musha M., Nagano K., Nagano S., Nakamura K., Nakamura T., Nakano H., Nakano M., Nakao K., Namai Y., Narikawa T., Naticchioni L., Quynh L. Nguyen, Ni W-T, Nishizawa A., Obuchi Y., Ochi T., Oh J. J., Oh S. H., Ohashi M., Ohishi N., Ohkawa M., Okutomi K., Ono K., Oohara K., Ooi C. P., Pan S-S, Park J., Arellano F. E. Pena, Pinto I, Sago N., Saijo M., Saito Y., Saitou S., Sakai K., Sakai Y., Sasai M., Sasaki M., Sasaki Y., Sato N., Sato S., Sato T., Sekiguchi Y., Seto N., Shibata M., Shimoda T., Shinkai H., Shishido T., Shoda A., Somiya K., Son E. J., Suemasa A., Suzuki T., Tagoshi H., Tahara H., Takahashi H., Takahashi R., Takamori A., Takeda H., Tanaka H., Tanaka K., Tanaka T., Tanioka S., San Martin E. N. Tapia, Tatsumi D., Terashima S., Tomaru T., Tomura T., Travasso F., Tsubono K., Tsuchida S., Uchikata N., Uchiyama T., Ueda A., Uehara T., Ueki S., Ueno K., Uraguchi F., Ushiba T., van Putten M. H. P. M., Vocca H., Wada S., Wakamatsu T., Watanabe Y., Xu W-R, Yamada T., Yamamoto A., Yamamoto K., Yamamoto S., Yamamoto T., Yokogawa K., Yokoyama J., Yokozawa T., Yoon T. H., Yoshioka T., Yuzurihara H., Zeidler S., Zhu Z-H

    CLASSICAL AND QUANTUM GRAVITY   36 ( 16 )   165008   2019.08( ISSN:0264-9381

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1088/1361-6382/ab28a9

  • Gravastar formation: What can be the evidence of a black hole? Reviewed

    Ken-ichi Nakao, Chul-Moon Yoo, Tomohiro Harada

    PHYSICAL REVIEW D   99 ( 4 )   044027-1 - 044027-22   2019.02( ISSN:2470-0010

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.99.044027

  • KAGRA: 2.5 generation interferometric gravitational wave detector Reviewed International coauthorship

    Akutsu T., Ando M., Arai K., Arai Y., Araki S., Araya A., Aritomi N., Asada H., Aso Y., Atsuta S., Awai K., Bae S., Baiotti L., Barton M. A., Cannon K., Capocasa E., Chen C-S., Chiu T-W., Cho K., Chu Y-K., Craig K., Creus W., Doi K., Eda K., Enomoto Y., Flaminio R., Fujii Y., Fujimoto M. -K., Fukunaga M., Fukushima M., Furuhata T., Haino S., Hasegawa K., Hashino K., Hayama K., Hirobayashi S., Hirose E., Hsieh B. H., Huang C-Z., Ikenoue B., Inoue Y., Ioka K., Itoh Y., Izumi K., Kaji T., Kajita T., Kakizaki M., Kamiizumi M., Kanbara S., Kanda N., Kanemura S., Kaneyama M., Kang G., Kasuya J., Kataoka Y., Kawai N., Kawamura S., Kawasaki T., Kim C., Kim J., Kim J. C., Kim W. S., Kim Y. -M., Kimura N., Kinugawa T., Kirii S., Kitaoka Y., Kitazawa H., Kojima Y., Kokeyama K., Komori K., Kong A. K. H., Kotake K., Kozu R., Kumar R., Kuo H-S., Kuroyanagi S., Lee H. K., Lee H. M., Lee H. W., Leonardi M., Lin C-Y., Lin F-L., Liu G. C., Liu Y., Majorana E., Mano S., Marchio M., Matsui T., Matsushima F., Michimura Y., Mio N., Miyakawa O., Miyamoto A., Miyamoto T., Miyo K., Miyoki S., Morii W., Morisaki S., Moriwaki Y., Morozumi T., Musha M., Nagano K., Nagano S., Nakamura K., Nakamura T., Nakano H., Nakano M., Nakao K., Narikawa T., Naticchioni L., Quynh L. Nguyen, Ni W. -T., Nishizawa A., Obuchi Y., Ochi T., Oh J. J., Oh S. H., Ohashi M., Ohishi N., Ohkawa M., Okutomi K., Ono K., Oohara K., Ooi C. P., Pan S-S., Park J., Arellano F. E. Pena, Pinto I., Sago N., Saijo M., Saitou S., Saito Y., Sakai K., Sakai Y., Sakai Y., Sasai M., Sasaki M., Sasaki Y., Sato S., Sato N., Sato T., Sekiguchi Y., Seto N., Shibata M., Shimoda T., Shinkai H., Shishido T., Shoda A., Somiya K., Son E. J., Suemasa A., Suzuki T., Suzuki T., Tagoshi H., Tahara H., Takahashi H., Takahashi R., Takamori A., Takeda H., Tanaka H., Tanaka K., Tanaka T., Tanioka S., San Martin E. N. Tapia, Tatsumi D., Tomaru T., Tomura T., Travasso F., Tsubono K., Tsuchida S., Uchikata N., Uchiyama T., Uehara T., Ueki S., Ueno K., Uraguchi F., Ushiba T., van Putten M. H. P. M., Vocca H., Wada S., Wakamatsu T., Watanabe Y., Xu W-R., Yamada T., Yamamoto A., Yamamoto K., Yamamoto K., Yamamoto S., Yamamoto T., Yokogawa K., Yokoyama J., Yokozawa T., Yoon T. H., Yoshioka T., Yuzurihara H., Zeidler S., Zhu Z. -H.

    NATURE ASTRONOMY   3 ( 1 )   35 - 40   2019.01( ISSN:2397-3366

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1038/s41550-018-0658-y

  • On the stability of a superspinar Reviewed International coauthorship

    Ken-ichi Nakao, Pankaj S. Joshi, Jun-Qi Guo, Prashant Kocherlakota, Hideyuki Tagoshi, Tomohiro Harada, Mandar Patil, Andrzej Krolak

    PHYSICS LETTERS B   780   410 - 413   2018.05( ISSN:0370-2693

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1016/j.physletb.2018.03.014

  • Non-linear collisional Penrose process: How much energy can a black hole release? Reviewed

    Ken-ichi Nakao, Hirotada Okawa, Kei-ichi Maeda

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   ( 1 )   013E01-1 - 013E01-21   2018.01( ISSN:2050-3911

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1093/ptep/ptx170

  • Construction of KAGRA: an underground gravitational-wave observatory Reviewed International coauthorship

    Akutsu T., Ando M., Araki S., Araya A., Arima T., Aritomi N., Asada H., Aso Y., Atsuta S., Awai K., Baiotti L., Barton M. A., Chen D., Cho K., Craig K., DeSalvo R., Doi K., Eda K., Enomoto Y., Flaminio R., Fujibayashi S., Fujii Y., Fujimoto M. -K., Fukushima M., Furuhata T., Hagiwara A., Haino S., Harita S., Hasegawa K., Hasegawa M., Hashino K., Hayama K., Hirata N., Hirose E., Ikenoue B., Inoue Y., Ioka K., Ishizaki H., Itoh Y., Jia D., Kagawa T., Kaji T., Kajita T., Kakizaki M., Kakuhata H., Kamiizumi M., Kanbara S., Kanda N., Kanemura S., Kaneyama M., Kasuya J., Kataoka Y., Kawaguchi K., Kawai N., Kawamura S., Kawazoe F., Kim C., Kim J., Kim J. C., Kim W., Kimura N., Kitaoka Y., Kobayashi K., Kojima Y., Kokeyama K., Komori K., Kotake K., Kubo K., Kumar R., Kume T., Kuroda K., Kuwahara Y., Lee H. -K., Lee H. -W., Lin C. -Y., Liu Y., Majorana E., Mano S., Marchio M., Matsui T., Matsumoto N., Matsushima F., Michimura Y., Mio N., Miyakawa O., Miyake K., Miyamoto A., Miyamoto T., Miyo K., Miyoki S., Morii W., Morisaki S., Moriwaki Y., Muraki Y., Murakoshi M., Musha M., Nagano K., Nagano S., Nakamura K., Nakamura T., Nakano H., Nakano M., Nakano M., Nakao H., Nakao K., Narikawa T., Ni W. -T., Nonomura T., Obuchi Y., Oh J. J., Oh S. -H., Ohashi M., Ohishi N., Ohkawa M., Ohmae N., Okino K., Okutomi K., Ono K., Ono Y., Oohara K., Ota S., Park J., Pena Arellano F. E., Pinto I. M., Principe M., Sago N., Saijo M., Saito T., Saito Y., Saitou S., Sakai K., Sakakibara Y., Sasaki Y., Sato S., Sato T., Sato Y., Sekiguchi T., Sekiguchi Y., Shibata M., Shiga K., Shikano Y., Shimoda T., Shinkai H., Shoda A., Someya N., Somiya K., Son E. J., Starecki T., Suemasa A., Sugimoto Y., Susa Y., Suwabe H., Suzuki T., Tachibana Y., Tagoshi H., Takada S., Takahashi H., Takahashi R., Takamori A., Takeda H., Tanaka H., Tanaka K., Tanaka T., Tatsumi D., Telada S., Tomaru T., Tsubono K., Tsuchida S., Tsukada L., Tsuzuki T., Uchikata N., Uchiyama T., Uehara T., Ueki S., Ueno K., Uraguchi F., Ushiba T., van Putten M. H. P. M., Wada S., Wakamatsu T., Yaginuma T., Yamamoto K., Yamamoto S., Yamamoto T., Yano K., Yokoyama J., Yokozawa T., Yoon T. H., Yuzurihara H., Zeidler S., Zhao Y., Zheng L., Agatsuma K., Akiyama Y., Arai N., Asano M., Bertolini A., Fujisawa M., Goetz R., Guscott J., Hashimoto Y., Hayashida Y., Hennes E., Hirai K., Hirayama T., Ishitsuka H., Kato J., Khalaidovski A., Koike S., Kumeta A., Miener T., Morioka M., Mueller C. L., Narita T., Oda Y., Ogawa T., Sekiguchi T., Tamura H., Tanner D. B., Tokoku C., Toritani M., Utsuki T., Uyeshima M., van den Brand J. F. J., van Heijningen J. V., Yamaguchi S., Yanagida A.

    PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS   2018 ( 1 )   013F01   2018.01( ISSN:2050-3911

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    DOI: 10.1093/ptep/ptx180

  • Spins of primordial black holes formed in the matter-dominated phase of the Universe Reviewed

    Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri, Ken-ichi Nakao

    PHYSICAL REVIEW D   96 ( 8 )   083517-1 - 083517-16   2017.10( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.96.083517

  • Nonlinear stability of a brane wormhole Reviewed

    Yumi Akai, Ken-ichi Nakaoi

    PHYSICAL REVIEW D   96 ( 2 )   024044-1 - 024044-15   2017.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.96.024033

  • Can we remove the systematic error due to isotropic inhomogeneities? Reviewed

    Hiroyuki Negishii, Ken-ichi Nakaoi

    PHYSICAL REVIEW D   95 ( 2 )   023002-1 - 023002-11   2017.01( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.95.023003

  • On the energy extraction by nonlinear collisional Penrose process Reviewed

    Nakao Ken-ichi, Okawa Hirotada, Maeda Kei-ichi

    Meeting Abstracts of the Physical Society of Japan   72.2 ( 0 )   339 - 339   2017

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    DOI: 10.11316/jpsgaiyo.72.2.0_339

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  • Primordial black hole formation in the matter-dominated phase of the Universe Reviewed International coauthorship

    Tomohiro Tomohiro, Chul-moon Yoo, Kazunori Kohrii, Ken-ichi Nakao, Sanjay Jhingan

    ASTROPHYSICAL JOURNAL   833 ( 1 )   61 - 68   2016.12( ISSN:0004-637X

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    DOI: 10.3847/1538-4357/833/1/61

  • Newtonian self-gravitating system in a relativistic huge void universe model Reviewed

    Ryusuke Nishikawa, Ken-ichi Nakao, Chul-Moon Yoo

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 12 )   004-1 - 004-32   2016.12( ISSN:1475-7516

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    DOI: 10.1088/1475-7516/2016/12/004

  • Infinite efficiency of the collisional Penrose process: Can a overspinning Kerr geometry be the source of ultrahigh-energy cosmic rays and neutrinos? Reviewed International coauthorship

    Mandar Patil, Tomohiro Harada, Ken-ichi Nakao, Pankaj S. Joshi, Masashi Kimura

    PHYSICAL REVIEW D   93 ( 10 )   104015-1 - 104015-28   2016.05( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.93.104015

  • Systematic error due to isotropic inhomogeneities Reviewed

    Hiroyuki Negishi, Ken-ichi Nakao, Chul-Moon Yoo, Ryusuke Nishikawa

    PHYSICAL REVIEW D   92 ( 10 )   103003-1 - 103003-11   2015.11( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.92.103003

  • Timescale for trans-Planckian collisions in Kerr spacetime Reviewed International coauthorship

    Mandar Patil, Pankaj S. Joshi, Ken-ichi Nakao, Masashi Kimura, Tomohiro Harada

    EPL   110 ( 3 )   30004-1 - 30004-6   2015.05( ISSN:0295-5075

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    DOI: 10.1209/0295-5075/110/30004

  • How small can an over-spinning body be in general relativity? Reviewed International coauthorship

    Ken-ichi Nakao, Masashi Kimura, Tomohiro Harada, Mandar Patil, Pankaj S. Joshi

    PHYSICAL REVIEW D   90 ( 12 )   124079-1 - 124079-15   2014.12( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.90.124079

  • Comparison of two approximation schemes for solving perturbations in a Lemaitre-Tolman-Bondi cosmological model Reviewed

    Nishikawa Ryusuke, Nakao Ken-ichi, Yoo Chul-Moon

    PHYSICAL REVIEW D   90 ( 10 )   107301-1 - 107301-5   2014.11( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.90.107301

  • Two-point correlation function of density perturbations in a large void universe Reviewed

    Nishikawa Ryusuke, Yoo Chul-Moon, Nakao Ken-ichi

    PHYSICAL REVIEW D   88 ( 12 )   123520-1 - 123520-8   2013.12( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.88.123520

  • Black-hole universe: Time evolution Reviewed

    Yoo Chul-Moon, Okawa Hirotada, Nakao Ken-ichi

    PHYSICAL REVIEW LETTERS   111 ( 16 )   161102-1 - 161102-4   2013.10( ISSN:0031-9007

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    DOI: 10.1103/PhysRevLett.111.161102

  • What wormhole is traversable? A case of a wormhole supported by a spherical thin shell Reviewed

    Nakao Ken-ichi, Uno Tatsuya, Kinoshita Shunichiro

    PHYSICAL REVIEW D   88 ( 4 )   044036-1 - 044036-10   2013.08( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.88.044036

  • Ultrahigh energy collision with neither black hole nor naked singularity Reviewed International coauthorship

    Nakao Ken-ichi, Kimura Masashi, Patil Mandar, Joshi Pankaj S.

    PHYSICAL REVIEW D   87 ( 10 )   104033-1 - 104033-12   2013.05( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.87.104033

  • Acceleration of particles and shells by Reissner-Nordstrom naked singularities Reviewed International coauthorship

    Patil Mandar, Joshi Pankaj S., Kimura Masashi, Nakao Ken-ichi

    PHYSICAL REVIEW D   86 ( 8 )   084023-1 - 084023-13   2012.10( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.86.084023

  • Black hole universe: Construction and analysis of initial data Reviewed

    Yoo Chul-Moon, Abe Hiroyuki, Takamori Yohsuke, Nakao Ken-ichi

    PHYSICAL REVIEW D   86 ( 4 )   044027-1 - 044027-13   2012.08( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.86.044027

  • Dynamical Instability in a Relativistic Cylindrical Shell Composed of Counter-Rotating Particles Reviewed

    KURITA Yasunari, NAKAO Ken-ichi

    Publication Office, Progress of Theoretical Physics Progress of theoretical physics   128 ( 1 )   191 - 211   2012.07( ISSN:0033068x

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    We perform a perturbative analysis of an infinitesimally thin cylindrical shell composed of counter-rotating collisionless particles, originally devised by Apostolatos and Thorne, who found a static solution of the shell and concluded by C-energy argument that it is stable. Recently, the present authors and Ida have reanalyzed this system by evaluating the C-energy on the future null infinity and found that the system shows instability, although it was not shown how the system is unstable. In this paper, it is shown in the framework of the linear perturbation theory that, if constituent particles move slowly, the static shell is unstable in the sense that the perturbation of its circumferential radius oscillates with an exponentially growing amplitude, whereas if the speed of the constituent particle exceeds a critical value, unstable modes exhibiting exponential expansion or contraction of the shell appear. The present result disproves the evidence for the conjecture of Apostolatos and Thorne, which states that rotation halts the spindle gravitational collapse, and seems to support the numerical results on the spindle collapse obtained by Shapiro and Teukolsky. It is still controversial whether their numerical results imply the formation of naked singularities. However, if the spindle gravitational collapse really results in the formation of naked singularities, our result implies a violation of the cosmic censorship conjecture.

    DOI: 10.1143/PTP.128.191

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  • Evolution of density perturbations in a large void universe Reviewed

    Nishikawa Ryusuke, Yoo Chul-Moon, Nakao Ken-ichi

    PHYSICAL REVIEW D   85 ( 10 )   103511-1 - 103511-23   2012.05( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.85.103511

  • Q-tubes and Q-crusts Reviewed

    Sakai Nobuyuki, Ishihara Hideki, Nakao Ken-ichi

    PHYSICAL REVIEW D   84 ( 10 )   105022-1 - 105022-5   2011.11( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.84.105022

  • Is super-Planckian physics visible?; Scattering of black holes in 5 dimensions Reviewed

    Okawa Hirotada, Nakao Ken-ichi, Shibata Masaru

    PHYSICAL REVIEW D   83 ( 12 )   121501(R)-1 - 121501(R)-5   2011.06( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.83.121501

  • Perturbative analysis of a stationary magnetosphere in an extreme black hole space-time: on the Meissner-like effect of an extreme black hole Reviewed

    Takamori Yohsuke, Nakao Ken-ichi, Ishihara Hideki, Kimura Masashi, Yoo Chul-Moon

    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   412 ( 4 )   2417 - 2432   2011.04( ISSN:0035-8711

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    DOI: 10.1111/j.1365-2966.2010.18063.x

  • Redshift drift in Lemaitre-Tolman-Bondi void universes Reviewed

    Yoo Chul-Moon, Kai Tomohiro, Nakao Ken-ichi

    PHYSICAL REVIEW D   83 ( 4 )   043527-1 - 043527-8   2011.02( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.83.043527

  • Acceleration of colliding shells around a black hole; Validity of the test particle approximation in the Banados-Silk-West process Reviewed

    Kimura Masashi, Nakao Ken-ichi, Tagoshi Hideyuki

    PHYSICAL REVIEW D   83 ( 4 )   044013-1 - 044013-8   2011.02( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.83.044013

  • Visible borders of spacetime generated by high-energy collisions Reviewed

    Nakao Ken-ichi, Harada Tomohiro, Miyamoto Umpei

    PHYSICAL REVIEW D   82 ( 12 )   121501(R)-1 - 121501(R)-4   2010.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.82.121501

  • CMB observations in LTB universes. Part II: the kSZ effect in an LTB universe Reviewed

    Yoo Chul-Moon, Nakao Ken-ichi, Sasaki Misao

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 10 )   011-1 - 011-20   2010.10( ISSN:1475-7516

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    DOI: 10.1088/1475-7516/2010/10/011

  • Testing the Copernican Principle with the kSZ Effect Reviewed

    Yoo Chul-Moon, Kai Tomohiro, Nakao Ken-ichi, Sasaki Misao

    JOURNAL OF THE KOREAN PHYSICAL SOCIETY   57 ( 3 )   610 - 614   2010.09( ISSN:0374-4884

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    DOI: 10.3938/jkps.57.610

  • CMB observations in LTB universes; Part I. Matching peak positions in the CMB spectrum Reviewed

    Yoo Chul-Moon, Nakao Ken-ichi, Sasaki Misao

    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS   ( 7 )   012 -1 - 012 -22   2010.07( ISSN:1475-7516

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    DOI: 10.1088/1475-7516/2010/07/012

  • DECIGO and DECIGO pathfinder Reviewed

    Masaki Ando, Seiji Kawamura, Naoki Seto, Shuichi Sato, Takashi Nakamura, Kimio Tsubono, Takeshi Takashima, Ikkoh Funaki, Kenji Numata, Nobuyuki Kanda, Takahiro Tanaka, Kunihito Ioka, Kazuhiro Agatsuma, Koh-suke Aoyanagi, Koji Arai, Akito Araya, Hideki Asada, Yoichi Aso, Takeshi Chiba, Toshikazu Ebisuzaki, Yumiko Ejiri, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Tomohiro Harada, Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida, Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki T. Inoue, Koji Ishidoshiro, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Kiwamu Izumi, Isao Kawano, Nobuki Kawashima, Fumiko Kawazoe, Naoko Kishimoto, Kenta Kiuchi, Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi, Yasufumi Kojima, Keiko Kokeyama, Wataru Kokuyama, Kei Kotake, Yoshihide Kozai, Hiroo Kunimori, Hitoshi Kuninaka, Kazuaki Kuroda, Kei-ichi Maeda, Hideo Matsuhara, Yasushi Mino, Osamu Miyakawa, Umpei Miyamoto, Shinji Miyoki, Mutsuko Y. Morimoto, Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Mitsuru Musha, Shigeo Nagano, Isao Naito, Kouji Nakamura, Masahiro Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Kazuhiro Nakazawa, Erina Nishida, Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa, Taiga Noumi, Yoshiyuki Obuchi, Masatake Ohashi, Naoko Ohishi, Masashi Ohkawa, Kenshi Okada, Norio Okada, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Ryo Saito, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Hisaaki Shinkai, Kentaro Somiya, Hajime Sotani, Naoshi Sugiyama, Yudai Suwa, Rieko Suzuki, Hideyuki Tagoshi, Fuminobu Takahashi, Kakeru Takahashi, Keitaro Takahashi, Ryutaro Takahashi, Ryuichi Takahashi, Tadayuki Takahashi, Hirotaka Takahashi, Takamori Akiteru, Tadashi Takano, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Yasuo Torii, Morio Toyoshima, Shinji Tsujikawa, Yoshiki Tsunesada, Akitoshi Ueda, Ken-ichi Ueda, Masayoshi Utashima, Yaka Wakabayashi, Kent Yagi, Hiroshi Yamakawa, Kazuhiro Yamamoto, Toshitaka Yamazaki, Jun'ichi Yokoyama, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino, Ken-Xun Sun

    CLASSICAL AND QUANTUM GRAVITY   27 ( 8 )   2010.04( ISSN:0264-9381

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    A space gravitational-wave antenna, DECIGO (DECI-hertz interferometer Gravitational wave Observatory), will provide fruitful insights into the universe, particularly on the formation mechanism of supermassive black holes, dark energy and the inflation of the universe. In the current pre-conceptual design, DECIGO will be comprising four interferometer units; each interferometer unit will be formed by three drag-free spacecraft with 1000 km separation. Since DECIGO will be an extremely challenging mission with high-precision formation flight with long baseline, it is important to increase the technical feasibility before its planned launch in 2027. Thus, we are planning to launch two milestone missions. DECIGO pathfinder (DPF) is the first milestone mission, and key components for DPF are being tested on ground and in orbit. In this paper, we review the conceptual design and current status of DECIGO and DPF.

    DOI: 10.1088/0264-9381/27/8/084010

  • Accelerated cosmic expansion in a scalar-field universe Reviewed International coauthorship

    Bhattacharya Swastik, Joshi Pankaj S., Nakao Ken-ichi

    PHYSICAL REVIEW D   81 ( 6 )   064032-1 - 064032-12   2010.03( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.81.064032

  • Maximal slicing of D-dimensional spherically symmetric vacuum spacetime Reviewed

    Nakao Ken-ichi, Abe Hiroyuki, Yoshino Hirotaka, Shibata Masaru

    PHYSICAL REVIEW D   80 ( 8 )   084028-1 - 084028-10   2009.10( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.80.084028

  • Relativistic Gravitational Collapse of a Cylindrical Shell of Dust. II; Settling Down Boundary Condition Reviewed

    Nakao Ken-ichi, Harada Tomohiro, Kurita Yasunari, Yoshiyuki MORISAWA, Department of Mathematics and Physics Graduate School of Science Osaka City University, Department of Physics Rikkyo University, Kanagawa Institute of Technology, Faculty of Liberal Arts and Science Osaka University of Economics and Law

    Published for the Yukawa Institute for Theoretical Physics and the Physical Society of Japan Progress of theoretical physics   122 ( 2 )   521 - 541   2009.08( ISSN:0033068x

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    We numerically study the dynamics of an imploding hollow cylinder composed of dust. Since there is no cylindrical black hole in 4-dimensional spacetime with physically reasonable energy conditions, a collapsed dust cylinder involves a naked singularity accompanied by its causal future, or a fatal singularity that terminates the history of the whole universe. In a previous paper, the present authors have shown that if the dust is assumed to be composed of collisionless particles such that these particles go through the symmetry axis of the cylinder, then the scalar polynomial singularity formed on the symmetry axis is so weak that almost all the geodesics are complete, and thus effectively no singularity forms by the collapse of a hollow dust cylinder. By contrast, in this paper, we assume that all the collapsed dust settles down on the symmetry axis by changing its equation of state. Obtained solutions are the straightforward extension of Morgan's null dust solution, in which no gravitational radiation is emitted. However, in the present case with timelike dust, an infinite amount of C-energy initially stored in the system is released through gravitational radiation. We also show that the gravitational waves asymptotically behave in a self-similar manner.

    DOI: 10.1143/PTP.122.521

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  • Einstein-Rosen waves and the self-similarity hypothesis in cylindrical symmetry Reviewed International coauthorship

    Harada Tomohiro, Nakao Ken-ichi, Nolan Brien C.

    PHYSICAL REVIEW D   80 ( 2 )   109903-1 - 109903-15   2009.07( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.80.024025

  • High-speed collapse of a hollow sphere of type I matter Reviewed International coauthorship

    Ahmad Zahid, Harada Tomohiro, Nakao Ken-ichi, Sharif M.

    CLASSICAL AND QUANTUM GRAVITY   26 ( 3 )   035007-1 - 035007-20   2009.02( ISSN:0264-9381

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    DOI: 10.1088/0264-9381/26/3/035007

  • Magnification Probability Distribution Functions of Standard Candles in a Clumpy Universe Reviewed

    Yoo Chul-Moon, Ishihara Hideki, Nakao Ken-ichi, Tagoshi Hideyuki

    PROGRESS OF THEORETICAL PHYSICS   120 ( 5 )   961 - 983   2008.11( ISSN:0033-068X

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    DOI: 10.1143/PTP.120.961

  • Solving the Inverse Problem with Inhomogeneous Universes Reviewed

    Yoo Chul-Moon, Kai Tomohiro, Nakao Ken-ichi

    PROGRESS OF THEORETICAL PHYSICS   120 ( 5 )   937 - 960   2008.11( ISSN:0033-068X

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    DOI: 10.1143/PTP.120.937

  • New instability in relativistic cylindrically symmetric system Reviewed

    Nakao Ken-ichi, Ida Daisuke, Kurita Yasunari

    PHYSICAL REVIEW D   77 ( 4 )   044021-1 - 044021-8   2008.02( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.77.044021

  • Critical collapse of Einstein cluster Reviewed International coauthorship

    Mahajan Ashutosh, Harada Tomohiro, Joshi Pankaj, Nakao Ken-ichi

    PROGRESS OF THEORETICAL PHYSICS   118 ( 5 )   865 - 878   2007.11( ISSN:0033068X

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    DOI: 10.1143/PTP.118.865

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  • Can Inhomogeneities Accelerate the Cosmic Volume Expansion? Reviewed

    Kai Tomohiro, Kozaki Hiroshi, Nakao Ken-ichi, Nambu Yasusada, Yoo Chul-Moon

    Published for the Yukawa Institute for Theoretical Physics and the Physical Society of Japan Progress of theoretical physics   117 ( 2 )   229 - 240   2007.02( ISSN:0033068x

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    If expanding and contracting regions coexist in the universe, the speed of the cosmic volume expansion can be accelerated. We construct simple inhomogeneous dust-filled universe models in which the speed of the cosmic volume expansion is accelerated for finite periods. These models are constructed by removing spherical domains from the Einstein-de Sitter universe and filling each domain with a Lemaitre-Tolman-Bondi dust sphere possessing the same gravitational mass as the removed region. This represents an exact solution of the Einstein equations. We find that acceleration of the cosmic volume expansion is realized in some cases when the size of the contracting region is comparable to the horizon radius of the Einstein-de Sitter universe though this model is very different from the universe observed today. This result implies that non-linear general relativistic effects of inhomogeneities are very important to realize the acceleration of the cosmic volume expansion.

    DOI: 10.1143/PTP.117.229

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  • Lensing effects on gravitational waves in a clumpy universe: Effects of inhomogeneity on the distance-redshift relation Reviewed

    Yoo Chul-Moon, Nakao Ken-ichi, Kozaki Hiroshi, Takahashi Ryuichi

    ASTROPHYSICAL JOURNAL   655 ( 2 )   691 - 703   2007.02( ISSN:0004-637X

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    DOI: 10.1086/510011

  • Relativistic Gravitational Collapse of a Cylindrical Shell of Dust Reviewed

    Nakao Ken-ichi, Kurita Yasunari, Morisawa Yoshiyuki, Harada Tomohiro

    Progress of theoretical physics   117 ( 1 )   75 - 102   2007.01( ISSN:0033068x

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    The gravitational collapse of a thick cylindrical shell of dust matter is investigated. It is found that a spacetime singularity forms on the symmetry axis and that it is necessarily naked, i.e., observable in principle. We propose a physically reasonable boundary condition at this naked singularity to construct the solution including its causal future. This boundary condition enables us to construct the unique continuation of spacetime beyond the naked singularity and ensures that the dust shell passes through the naked singularity. When the cylindrical shell leaves its symmetry axis away, the naked singularity disappears, and regularity is recovered. We construct numerical solutions with this feature. This result implies that the gravity produced by a thick cylindrical shell of dust is too weak to bind the shell even if it engenders the formation of a curvature singularity which is so strong as to satisfy the limiting focusing condition. For this reason, this naked singularity is very weak in the extended spacetime; the metric tensor is C^<1-> even at the naked singularity, and the extended spacetime is complete for almost all geodesies. This feature is also seen for singular hypersurfaces. Such an extended spacetime can be regarded as phenomenological in the sense that it is valid if the relevant microphysics length scale is sufficiently small compared to the scale of interest.

    DOI: 10.1143/PTP.117.75

    CiNii Article

  • Results of the search for inspiraling compact star binaries from TAMA300's observation in 2000-2004 Reviewed

    Akutsu Tomomi, Akutsu Tomotada, Ando Masaki, Arai Koji, Araya Akito, Asada Hideki, Aso Youichi, Barton Mark A., Beyersdorf Peter, Fujiki Youhei, Fujimoto Masa-Katsu, Fujita Ryuichi, Fukushima Mitsuhiro, Futamase Toshifumi, Hamuro Yusaku, Haruyama Tomiyoshi, Hayakawa Hideaki, Hayama Kazuhiro, Heinzel Gerhard, Horikoshi Gen'ichi, Iguchi Hideo, Iida Yukiyoshi, Ioka Kunihito, Ishitsuka Hideki, Kamikubota Norihiko, Kanda Nobuyuki, Kaneyama Takaharu, Karasawa Yoshikazu, Kasahara Kunihiko, Kasai Taketoshi, Katsuki Mayu, Kawabe Keita, Kawamura Mari, Kawamura Seiji, Kawashima Nobuki, Kawazoe Fumiko, Kojima Yasufumi, Kokeyama Keiko, Kondo Kazuhiro, Kozai Yoshihide, Kudoh Hideaki, Kuroda Kazuaki, Kuwabara Takashi, Matsuda Namio, Mio Norikatsu, Miura Kazuyuki, Miyakawa Osamu, Miyama Shoken, Miyoki Shinji, Mizusawa Hiromi, Moriwaki Shigenori, Musha Mitsuru, Nagano Shigeo, Nagayama Yoshitaka, Nakagawa Ken'ichi, Nakamura Takashi, Nakano Hiroyuki, Nakao Ken-ichi, Nishi Yuhiko, Numata Kenji, Ogawa Yujiro, Ohashi Masatake, Ohishi Naoko, Okutomi Akira, Oohara Ken-ichi, Otsuka Shigemi, Sago Norichika, Saito Yoshio, Sakata Shihori, Sasaki Misao, Sato Kouichi, Sato Nobuaki, Sato Shuichi, Sato Youhei, Seki Hidetsugu, Sekido Aya, Seto Naoki, Shibata Masaru, Shinkai Hisaaki, Shintomi Takakazu, Soida Kenji, Somiya Kentaro, Suzuki Toshikazu, Tagoshi Hideyuki, Takahashi Hirotaka, Takahashi Ryutaro, Takamori Akiteru, Takemoto Shuzo, Takeno Kohei, Tanaka Takahiro, Taniguchi Keisuke, Taniguchi Shinsuke, Tanji Toru, Tatsumi Daisuke, Taylor C. T., Telada Souichi, Tochikubo Kuniharu, Tokunari Masao, Tomaru Takayuki, Tsubono Kimio, Tsuda Nobuhiro, Tsunesada Yoshiki, Uchiyama Takashi, Ueda Akitoshi, Ueda Ken-ichi, Usui Fumihiko, Waseda Koichi, Watanabe Yuko, Yakura Hiromi, Yamamoto Akira, Yamamoto Kazuhiro, Yamazaki Toshitaka, Yanagi Yuriko, Yoda Tatsuo, Yokoyama Jun'ichi, Yoshida Tatsuru, Zhu Zong-Hong

    PHYSICAL REVIEW D   74 ( 12 )   122002   2006.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.74.122002

  • Is it possible to create a universe out of a monopole in the laboratory? Reviewed

    Sakai Nobuyuki, Nakao Ken-ichi, Ishihara Hideki, Kobayashi Makoto

    PHYSICAL REVIEW D   74 ( 2 )   024026-1 - 024026-10   2006.07( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.74.024026

  • Joint LIGO and TAMA300 search for gravitational waves from inspiralling neutron star binaries Reviewed International coauthorship

    Abbott B., Abbott R., Adhikari R., Ageev A., Agresti J., Ajith P., Allen B., Allen J., Amin R., Anderson S. B., Anderson W. G., Araya M., Armandula H., Ashley M., Asiri F., Aufmuth P., Aulbert C., Babak S., Balasubramanian R., Ballmer S., Barish B. C., Barker C., Barker D., Barnes M., Barr B., Barton M. A., Bayer K., Beausoleil R., Belczynski K., Bennett R., Berukoff S. J., Betzwieser J., Bhawal B., Bilenko I. A., Billingsley G., Black E., Blackburn K., Blackburn L., Bland B., Bochner B., Bogue L., Bork R., Bose S., Brady P. R., Braginsky V. B., Brau J. E., Brown D. A., Bullington A., Bunkowski A., Buonanno A., Burgess R., Busby D., Butler W. E., Byer R. L., Cadonati L., Cagnoli G., Camp J. B., Cannizzo J., Cannon K., Cantley C. A., Cao J., Cardenas L., Carter K., Casey M. M., Castiglione J., Chandler A., Chapsky J., Charlton P., Chatterji S., Chelkowski S., Chen Y., Chickarmane V., Chin D., Christensen N., Churches D., Cokelaer T., Colacino C., Coldwell R., Coles M., Cook D., Corbitt T., Coyne D., Creighton J. D. E., Creighton T. D., Crooks D. R. M., Csatorday P., Cusack B. J., Cutler C., Dalrymple J., D'Ambrosio E., Danzmann K., Davies G., Daw E., DeBra D., Delker T., Dergachev V., Desai S., DeSalvo R., Dhurandhar S., Di Credico A., Diaz M., Ding H., Drever R. W. P., Dupuis R. J., Edlund J. A., Ehrens P., Elliffe E. J., Etzel T., Evans M., Evans T., Fairhurst S., Fallnich C., Farnham D., Fejer M. M., Findley T., Fine M., Finn L. S., Franzen K. Y., Freise A., Frey R., Fritschel P., Frolov V. V., Fyffe M., Ganezer K. S., Garofoli J., Giaime J. A., Gillespie A., Goda K., Goggin L., Gonzalez G., Gossler S., Grandclement P., Grant A., Gray C., Gretarsson A. M., Grimmett D., Grote H., Grunewald S., Guenther M., Gustafson E., Gustafson R., Hamilton W. O., Hammond M., Hanna C., Hanson J., Hardham C., Harms J., Harry G., Hartunian A., Heefner J., Hefetz Y., Heinzel G., Heng I. S., Hennessy M., Hepler N., Heptonstall A., Heurs M., Hewitson M., Hild S., Hindman N., Hoang P., Hough J., Hrynevych M., Hua W., Ito M., Itoh Y., Ivanov A., Jennrich O., Johnson B., Johnson W. W., Johnston W. R., Jones D. I., Jones G., Jones L., Jungwirth D., Kalogera V., Katsavounidis E., Kawabe K., Kells W., Kern J., Khan A., Killbourn S., Killow C. J., Kim C., King C., King P., Klimenko S., Koranda S., Koetter K., Kovalik J., Kozak D., Krishnan B., Landry M., Langdale J., Lantz B., Lawrence R., Lazzarini A., Lei M., Leonor I., Libbrecht K., Libson A., Lindquist P., Liu S., Logan J., Lormand M., Lubinski M., Lueck H., Luna M., Lyons T. T., Machenschalk B., MacInnis M., Mageswaran M., Mailand K., Majid W., Malec M., Mandic V., Mann F., Marin A., Marka S., Maros E., Mason J., Mason K., Matherny O., Matone L., Mavalvala N., McCarthy R., McClelland D. E., McHugh M., McNabb J. W. C., Melissinos A., Mendell G., Mercer R. A., Meshkov S., Messaritaki E., Messenger C., Mikhailov E., Mitra S., Mitrofanov V. P., Mitselmakher G., Mittleman R., Miyakawa O., Mohanty S., Moreno G., Mossavi K., Mueller G., Mukherjee S., Murray P., Myers E., Myers J., Nagano S., Nash T., Nayak R., Newton G., Nocera F., Noel J. S., Nutzman P., Olson T., O'Reilly B., Ottaway D. J., Ottewill A., Ouimette D., Overmier H., Owen B. J., Pan Y., Papa M. A., Parameshwaraiah V., Parameswariah C., Pedraza M., Penn S., Pitkin M., Plissi M., Prix R., Quetschke V., Raab F., Radkins H., Rahkola R., Rakhmanov M., Rao S. R., Rawlins K., Ray-Majumder S., Re V., Redding D., Regehr M. W., Regimbau T., Reid S., Reilly K. T., Reithmaier K., Reitze D. H., Richman S., Riesen R., Riles K., Rivera B., Rizzi A., Robertson D. I., Robertson N. A., Robinson C., Robison L., Roddy S., Rodriguez A., Rollins J., Romano J. D., Romie J., Rong H., Rose D., Rotthoff E., Rowan S., Ruediger A., Ruet L., Russell P., Ryan K., Salzman I., Sandberg V., Sanders G. H., Sannibale V., Sarin P., Sathyaprakash B., Saulson P. R., Savage R., Sazonov A., Schilling R., Schlaufman K., Schmidt V., Schnabel R., Schofield R., Schutz B. F., Schwinberg P., Scott S. M., Seader S. E., Searle A. C., Sears B., Seel S., Seifert F., Sellers D., Sengupta A. S., Shapiro C. A., Shawhan P., Shoemaker D. H., Shu Q. Z., Sibley A., Siemens X., Sievers L., Sigg D., Sintes A. M., Smith J. R., Smith M., Smith M. R., Sneddon P. H., Spero R., Spjeld O., Stapfer G., Steussy D., Strain K. A., Strom D., Stuver A., Summerscales T., Sumner M. C., Sung M., Sutton P. J., Sylvestre J., Tanner D. B., Tariq H., Tarallo M., Taylor I., Taylor R., Taylor R., Thorne K. A., Thorne K. S., Tibbits M., Tilav S., Tinto M., Tokmakov K. V., Torres C., Torrie C., Traylor G., Tyler W., Ugolini D., Ungarelli C., Vallisneri M., van Putten M., Vass S., Vecchio A., Veitch J., Vorvick C., Vyachanin S. P., Wallace L., Walther H., Ward H., Ward R., Ware B., Watts K., Webber D., Weidner A., Weiland U., Weinstein A., Weiss R., Welling H., Wen L., Wen S., Wette K., Whelan J. T., Whitcomb S. E., Whiting B. F., Wiley S., Wilkinson C., Willems P. A., Williams P. R., Williams R., Willke B., Wilson A., Winjum B. J., Winkler W., Wise S., Wiseman A. G., Woan G., Woods D., Wooley R., Worden J., Wu W., Yakushin I., Yamamoto H., Yoshida S., Zaleski K. D., Zanolin M., Zawischa I., Zhang L., Zhu R., Zotov N., Zucker M., Zweizig J., Akutsu T., Akutsu T., Ando M., Arai K., Araya A., Asada H., Aso Y., Beyersdorf P., Fujiki Y., Fujimoto M. -K., Fujita R., Fukushima M., Futamase T., Hamuro Y., Haruyama T., Hayama K., Iguchi H., Iida Y., Ioka K., Ishitsuka H., Kamikubota N., Kanda N., Kaneyama T., Karasawa Y., Kasahara K., Kasai T., Katsuki M., Kawamura S., Kawamura M., Kawazoe F., Kojima Y., Kokeyama K., Kondo K., Kozai Y., Kudoh H., Kuroda K., Kuwabara T., Matsuda N., Mio N., Miura K., Miyama S., Miyoki S., Mizusawa H., Moriwaki S., Musha M., Nagayama Y., Nakagawa K., Nakamura T., Nakano H., Nakao K., Nishi Y., Numata K., Ogawa Y., Ohashi M., Ohishi N., Okutomi A., Oohara K., Otsuka S., Saito Y., Sakata S., Sasaki M., Sato N., Sato S., Sato Y., Sato K., Sekido A., Seto N., Shibata M., Shinkai H., Shintomi T., Soida K., Somiya K., Suzuki T., Tagoshi H., Takahashi H., Takahashi R., Takamori A., Takemoto S., Takeno K., Tanaka T., Taniguchi K., Tanji T., Tatsumi D., Telada S., Tokunari M., Tomaru T., Tsubono K., Tsuda N., Tsunesada Y., Uchiyama T., Ueda K., Ueda A., Waseda K., Yamamoto A., Yamamoto K., Yamazaki T., Yanagi Y., Yokoyama J., Yoshida T., Zhu Z. -H.

    PHYSICAL REVIEW D   73 ( 10 )   102002   2006.05( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.73.102002

  • Naked singularity resolution in cylindrical collapse Reviewed

    Kurita Y, Nakao K

    PHYSICAL REVIEW D   73 ( 6 )   064022-1 - 064022-9   2006.03( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.73.064022

  • Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts Reviewed International coauthorship

    Abbott B, Abbott R, Adhikari R, Ageev A, Agresti J, Ajith P, Allen B, Allen J, Amin R, Anderson SB, Anderson WG, Araya M, Armandula H, Ashley M, Asiri F, Aufmuth P, Aulbert C, Babak S, Balasubramanian R, Ballmer S, Barish BC, Barker C, Barker D, Barnes M, Barr B, Barton MA, Bayer K, Beausoleil R, Belczynski K, Bennett R, Berukoff SJ, Betzwieser J, Bhawal B, Bilenko IA, Billingsley G, Black E, Blackburn K, Blackburn L, Bland B, Bochner B, Bogue L, Bork R, Bose S, Brady PR, Braginsky VB, Brau JE, Brown DA, Bullington A, Bunkowski A, Buonanno A, Burgess R, Busby D, Butler WE, Byer RL, Cadonati L, Cagnoli G, Camp JB, Cannizzo J, Cannon K, Cantley CA, Cao J, Cardenas L, Carter K, Casey MM, Castiglione J, Chandler A, Chapsky J, Charlton P, Chatterji S, Chelkowski S, Chen Y, Chickarmane V, Chin D, Christensen N, Churches D, Cokelaer T, Colacino C, Coldwell R, Coles M, Cook D, Corbitt T, Coyne D, Creighton JDE, Creighton TD, Crooks DRM, Csatorday P, Cusack BJ, Cutler C, Dalrymple J, D'Ambrosio E, Danzmann K, Davies G, Daw E, DeBra D, Delker T, Dergachev V, Desai S, DeSalvo R, Dhurandhar S, Di Credico A, Diaz M, Ding H, Drever RWP, Dupuis RJ, Edlund JA, Ehrens P, Elliffe EJ, Etzel T, Evans M, Evans T, Fairhurst S, Fallnich C, Farnham D, Fejer MM, Findley T, Fine M, Finn LS, Franzen KY, Freise A, Frey R, Fritschel P, Frolov VV, Fyffe M, Ganezer KS, Garofoli J, Giaime JA, Gillespie A, Goda K, Goggin L, Gonzalez G, Gossler S, Grandclement P, Grant A, Gray C, Gretarsson AM, Grimmett D, Grote H, Grunewald S, Guenther M, Gustafson E, Gustafson R, Hamilton WO, Hammond M, Hanna C, Hanson J, Hardham C, Harms J, Harry G, Hartunian A, Heefner J, Hefetz Y, Heinzel G, Heng IS, Hennessy M, Hepler N, Heptonstall A, Heurs M, Hewitson M, Hild S, Hindman N, Hoang P, Hough J, Hrynevych M, Hua W, Ito M, Itoh Y, Ivanov A, Jennrich O, Johnson B, Johnson WW, Johnston WR, Jones DI, Jones G, Jones L, Jungwirth D, Kalogera V, Katsavounidis E, Kawabe K, Kells W, Kern J, Khan A, Killbourn S, Killow CJ, Kim C, King C, King P, Klimenko S, Koranda S, Kotter K, Kovalik J, Kozak D, Krishnan B, Landry M, Langdale J, Lantz B, Lawrence R, Lazzarini A, Lei M, Leonor I, Libbrecht K, Libson A, Lindquist P, Liu S, Logan J, Lormand M, Lubinski M, Luck H, Luna M, Lyons TT, Machenschalk B, MacInnis M, Mageswaran M, Mailand K, Majid W, Malec M, Mandic V, Mann F, Marin A, Marka S, Maros E, Mason J, Mason K, Matherny O, Matone L, Mavalvala N, McCarthy R, McClelland DE, McHugh M, McNabb JWC, Melissinos A, Mendell G, Mercer RA, Meshkov S, Messaritaki E, Messenger C, Mikhailov E, Mitra S, Mitrofanov VP, Mitselmakher G, Mittleman R, Miyakawa O, Mohanty S, Moreno G, Mossavi K, Mueller G, Mukherjee S, Murray P, Myers E, Myers J, Nagano S, Nash T, Nayak R, Newton G, Nocera F, Noel JS, Nutzman P, Olson T, O'Reilly B, Ottaway DJ, Ottewill A, Ouimette D, Overmier H, Owen BJ, Pan Y, Papa MA, Parameshwaraiah V, Parameswariah C, Pedraza M, Penn S, Pitkin M, Plissi M, Prix R, Quetschke V, Raab F, Radkins H, Rahkola R, Rakhmanov M, Rao SR, Rawlins K, Ray-Majumder S, Re V, Redding D, Regehr MW, Regimbau T, Reid S, Reilly KT, Reithmaier K, Reitze DH, Richman S, Riesen R, Riles K, Rivera B, Rizzi A, Robertson DI, Robertson NA, Robinson C, Robison L, Roddy S, Rodriguez A, Rollins J, Romano JD, Romie J, Rong H, Rose D, Rotthoff E, Rowan S, Rudiger A, Ruet L, Russell P, Ryan K, Salzman I, Sandberg V, Sanders GH, Sannibale V, Sarin P, Sathyaprakash B, Saulson PR, Savage R, Sazonov A, Schilling R, Schlaufman K, Schmidt V, Schnabel R, Schofield R, Schutz BF, Schwinberg P, Scott SM, Seader SE, Searle AC, Sears B, Seel S, Seifert F, Sellers D, Sengupta AS, Shapiro CA, Shawhan P, Shoemaker DH, Shu QZ, Sibley A, Siemens X, Sievers L, Sigg D, Sintes AM, Smith JR, Smith M, Smith MR, Sneddon PH, Spero R, Spjeld O, Stapfer G, Steussy D, Strain KA, Strom D, Stuver A, Summerscales T, Sumner MC, Sung M, Sutton PJ, Sylvestre J, Tanner DB, Tariq H, Tarallo M, Taylor I, Taylor R, Taylor R, Thorne KA, Thorne KS, Tibbits M, Tilav S, Tinto M, Tokmakov KV, Torres C, Torrie C, Traylor G, Tyler W, Ugolini D, Ungarelli C, Vallisneri M, van Putten M, Vass S, Vecchio A, Veitch J, Vorvick C, Vyachanin SP, Wallace L, Walther H, Ward H, Ward R, Ware B, Watts K, Webber D, Weidner A, Weiland U, Weinstein A, Weiss R, Welling H, Wen L, Wen S, Wette K, Whelan JT, Whitcomb SE, Whiting BF, Wiley S, Wilkinson C, Willems PA, Williams PR, Williams R, Willke B, Wilson A, Winjum BJ, Winkler W, Wise S, Wiseman AG, Woan G, Woods D, Wooley R, Worden J, Wu W, Yakushin I, Yamamoto H, Yoshida S, Zaleski KD, Zanolin M, Zawischa I, Zhang L, Zhu R, Zotov N, Zucker M, Zweizig J, Akutsu T, Akutsu T, Ando M, Arai K, Araya A, Asada H, Aso Y, Beyersdorf P, Fujiki Y, Fujimoto MK, Fujita R, Fukushima M, Futamase T, Hamuro Y, Haruyama T, Hayama K, Iguchi H, Iida Y, Ioka K, Ishizuka H, Kamikubota N, Kanda N, Kaneyama T, Karasawa Y, Kasahara K, Kasai T, Katsuki M, Kawamura S, Kawamura M, Kawazoe F, Kojima Y, Kokeyama K, Kondo K, Kozai Y, Kudoh H, Kuroda K, Kuwabara T, Matsuda N, Mio N, Miura K, Miyama S, Miyoki S, Mizusawa H, Moriwaki S, Musha M, Nagayama Y, Nakagawa K, Nakamura T, Nakano H, Nakao K, Nishi Y, Numata K, Ogawa Y, Ohashi M, Ohishi N, Okutomi A, Oohara K, Otsuka S, Saito Y, Sakata S, Sasaki M, Sato N, Sato S, Sato Y, Sato K, Sekido A, Seto N, Shibata M, Shinkai H, Shintomi T, Soida K, Somiya K, Suzuki T, Tagoshi H, Takahashi H, Takahashi R, Takamori A, Takemoto S, Takeno K, Tanaka T, Taniguchi K, Tanji T, Tatsumi D, Telada S, Tokunari M, Tomaru T, Tsubono K, Tsuda N, Tsunesada Y, Uchiyama T, Ueda K, Ueda A, Waseda K, Yamamoto A, Yamamoto K, Yamazaki T, Yanagi Y, Yokoyama J, Yoshida T, Zhu ZH

    PHYSICAL REVIEW D   72 ( 12 )   122004   2005.12( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.72.122004

  • Black strings in our world Reviewed

    Nakano H, Nakao KI, Yamaguchi M

    PHYSICAL REVIEW D   71 ( 12 )   124013-1 - 124013-7   2005.06( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.71.124013

  • Gravitational radiation from a cylindrical naked singularity Reviewed

    Nakao K, Morisawa Y

    PHYSICAL REVIEW D   71 ( 12 )   124007-1 - 124007-9   2005.06( ISSN:1550-7998

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    DOI: 10.1103/PhysRevD.71.124007

  • Hoop conjecture in five dimensions: Violation of cosmic censorship Reviewed

    Yoo CM, Nakao KI, Ida D

    PHYSICAL REVIEW D   71 ( 10 )   104014-1 - 104014-12   2005.05( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.71.104014

  • Observation results by the TAMA300 detector on gravitational wave bursts from stellar-core collapses Reviewed

    Ando M, Arai K, Aso Y, Beyersdorf P, Hayama K, Iida Y, Kanda N, Kawamura S, Kondo K, Mio N, Miyoki S, Moriwaki S, Nagano S, Numata K, Sato S, Somiya K, Tagoshi H, Takahashi H, Takahashi R, Tatsumi D, Tsunesada Y, Zhu ZH, Akutsu T, Akutsu T, Araya A, Asada H, Barton MA, Fujiki Y, Fujimoto MK, Fujita R, Fukushima M, Futamase T, Hamuro Y, Haruyama T, Hayakawa H, Heinzel G, Horikoshi G, Iguchi H, Ioka K, Ishitsuka H, Kamikubota N, Kaneyama T, Karasawa Y, Kasahara K, Kasai T, Katsuki M, Kawabe K, Kawamura M, Kawashima N, Kawazoe F, Kojima Y, Kokeyama K, Kozai Y, Kudoh H, Kuroda K, Kuwabara T, Matsuda N, Miura K, Miyakawa O, Miyama S, Mizusawa H, Musha M, Nagayama Y, Nakagawa K, Nakamura T, Nakano H, Nakao K, Nishi Y, Ogawa Y, Ohashi M, Ohishi N, Okutomi A, Oohara K, Otsuka S, Saito Y, Sakata S, Sasaki M, Sato K, Sato N, Sato Y, Seki H, Sekido A, Seto N, Shibata M, Shinkai H, Shintomi T, Soida K, Suzuki T, Takamori A, Takemoto S, Takeno K, Tanaka T, Taniguchi K, Taniguchi S, Tanji T, Taylor CT, Telada S, Tochikubo K, Tokunari M, Tomaru T, Tsubono K, Tsuda N, Uchiyama T, Ueda A, Ueda K, Usui F, Waseda K, Watanabe Y, Yakura H, Yamamoto A, Yamamoto K, Yamazaki T, Yanagi Y, Yoda T, Yokoyama J, Yoshida T

    PHYSICAL REVIEW D   71 ( 8 )   082002   2005.04( ISSN:2470-0010

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    DOI: 10.1103/PhysRevD.71.082002

  • High-speed cylindrical collapse of perfect fluid Reviewed

    Nakao K, Morisawa Y

    PROGRESS OF THEORETICAL PHYSICS   113 ( 1 )   73 - 85   2005.01( ISSN:0033-068X

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    DOI: 10.1143/PTP.113.73

  • Border of Spacetime Reviewed

    Tomohiro Harada, Ken-ichi Nakao

    Physical Review D   70   041501(R)-1 - 041501(R)-3   2004.08

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    DOI: 10.1103/PhysRevD.70.041501

  • High Speed Dynamics of Collapsing Cylindrical Dust Fluid Reviewed

    Ken-ichi Nakao, Yoshiyuki Morisawa

    Classical and Quantum Gravity   21   2101 - 2113   2004.04

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    DOI: 10.1088/0264-9381/21/8/013

  • Coincidence analysis to search for inspiraling compact binaries using TAMA and LISM data Reviewed

    Physical Review D   70 ( 4 )   042003   2004

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    DOI: 10.1103/PhysRevD.70.042003

  • Hoop Conjecture and Cosmic Censorship in the Brane-World Reviewed

    Ken-ichi Nakao, Kouji Nakamura, Takashi Mishima

    Physics Letter B   564   143 - 148   2003.07

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    DOI: 10.1016/S0370-2693(03)00588-4

  • How Does Naked Singularity Look? Reviewed

    Ken-ichi Nakao, Naoki Kobayashi, Hideki Ishihara

    Physical Review D   67   084002-1 - 084002-14   2003.04

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    DOI: 10.1103/PhysRevD.67.084002

  • Thick Domain Walls around a Black Hole Reviewed

    Yoshiyuki Morisawa, Daisuke Ida, Akihiro Ishibashi, Ken-ichi Nakao

    Physical Review D   67   025017-1 - 025017-9   2003.01

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    DOI: 10.1103/PhysRevD.67.025017

  • Development of a multistage laser frequency stabilization for an interferometric gravitational-wave detector Reviewed

    Review of Scientific Instruments   74   4176 - 4183   2003

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1063/1.1597958

  • Is Dark Energy the Only Solution to the Apparent Acceleration of the Present Universe? Reviewed

    Hideo Iguchi, Takashi Nakamura, Ken-ichi Nakao

    Progress of Theoretical Physics   108   809 - 818   2002.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1143/PTP.108.809

  • Volume Expansion of Swiss-Cheese Universe Reviewed

    Hiroshi Kosaki, Ken-ichi Nakao

    Physical Review D   66   104008-1 - 104008-9   2002.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.66.104008

  • Isoperimetric Inequality for Higher-Dimensional Black Holes Reviewed

    Daisuke Ida, Ken-ichi Nakao

    Physical Review D   66   064026-1 - 064026-8   2002.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.66.064026

  • Physical Processes in Naked Singularity Formation Invited

    Tomohiro Harada, Hideo Iguchi, Ken-ichi Nakao

    Progress of Theoretical Physics   107   449 - 524   2002.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1143/PTP.107.449

  • Naked Singularities and Quantum Gravity Reviewed International coauthorship

    Physical Reiview D   64   041501(R)-1 - 041501(R)-5   2001.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.64.041501

  • Newtonian Analysis of the Gravitational Waves due to the Formation of a Naked Singularity Reviewed

    Physical Review D   63   084003-1 - 084003-15   2001.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Response of Interferometric Detectors to Scalar Gravitational Waves Reviewed

    Physical Review D   63   082001-1 - 082001-14   2001.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.63.082001

  • Stable Operation of a 300-m Laser Interferometer with Enough Sensitivity to Detect Gravitational Wave Events within our Galaxy Reviewed

    Physical Review Letters   86   3950 - 3954   2001

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevLett.86.3950

  • The First Search of Gravitational Waves from Inspiraling Compact Binaries using TAMA300 data Reviewed

    Physical Review D   63 ( 6 )   062001   2001

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.63.062001

  • Power, energy and spectrum of a naked singularity explosion Reviewed

    Physical Review D   62   084037-1 - 084037-17   2000.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Thick Domain Walls Intersecting a Black Hole Reviewed

    Physical Review D   62   084022-1 - 084022-11   2000.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Causal Structure of an Inflating Magnetic Monopole Reviewed

    Physical Review D   61   127302-1 - 127302-4   2000.05

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Naked singularity explosion Reviewed

    Physical Review D   61   101502(R)-1 - 101502(R)-4   2000.04

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Gravitational Waves around a Naked Singularity II: Even Parity Perturbation Reviewed

    Progress of Theoretical Physics   103 ( 1 )   53 - 72   2000.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • How Do Nonlinear Voids Affect Light Propagation? Reviewed

    Progress of Theoretical Physics   103 ( 1 )   73 - 89   2000.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1143/PTP.103.73

  • Distance-redshift relation in an Inhomogeneous Universe; Spherically symmetric dust-shell Universe II Reviewed

    Physical Review D   60   103508-1 - 103508-14   1999.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Nakedness and Curvature Strength of Shell-Focusing Singularity in the Spherically Symmetric Space-Time with Vanishing Radial Pressure Reviewed

    Classical and Quantum Gravity   16   2785 - 2796   1999.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1088/0264-9381/16/8/315

  • Gravitational Radiation from a Naked Singularity: Odd-Parity Perturbation Reviewed

    Progress of Theoretical Physics   101   1235 - 1252   1999.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1143/PTP.101.1235

  • Collision of Timelike Shells in Spherically Symmetric Spacetime Reviewed

    Progress of Theoretical Physics   101 ( 5 )   989 - 1000   1999.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1143/PTP.101.989

  • Crossing of Spherical Massive Shells in Vacuum Space-Time Reviewed

    Ken-ichi Nakao, Daisuke Ida, Norimasa Sugiura

    Progress of Theoretical Physics   101   47 - 71   1999.01

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1143/PTP.101.47

  • Hoop Conjecture for Colliding Black Holes Reviewed

    Physical Review D   58   121501-1 - 121501-4   1998.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Distance-redshift relation in an isotropic inhomogeneous universe: Spherically symmetric dust-shell universe Reviewed

    Physical Review D   58   103504-1 - 103504-12   1998.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Naked Singularity Formation in the Collapse of a Spherical Cloud of Counter-Rotating Particles Reviewed

    Physical Review D   58   041502(R)-1 - 041502(R)-5   1998.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Gravitational Waves around a Naked Singularity Space-Time; Odd-parity perturbation of Lemaitre-Tolman-Bondi Space-Time Reviewed

    Physical Review D   57   7262 - 7273   1998.06

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.57.7262

  • Two Boosted Black Holes in Asymptotically de Sitter Space-Time; Relation between Mass and Apparent Horizon Formation Reviewed

    Physical Review D   57   6119 - 6126   1998.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Gravitational Physics in Scalar-Tensor Theories

    Progress of Theoretical Physics Supplement   128   335 - 372   1997.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Scalar gravitational wave from Oppenheimer-Snyder Collapse in Scalar-Tensor Theories of Gravity Reviewed

    Physical Review D   55   2024 - 2037   1997.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.55.2024

  • The Hubble parameter in void universe: effect of the peculiar velocity Reviewed

    Astrophysical Journal   453   541 - 544   1995.11

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • The volume expansion rate and the age of the Universe Reviewed

    Monthly Notices of the Royal Astronomical Society   276   L41 - L44   1995.09

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Horizons of the Kastor-Traschen Multi-Black-Hole Cosmos Reviewed

    Physical Review D   52   796 - 808   1995.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.52.796

  • Scalar Type Gravitational Waves from Gravitational Collapse in Brans-Dicke Theory; Detectability by a Laser Interferometer Reviewed

    Physical Review D   50   7304 - 7317   1994.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.50.7304

  • The Gravitational Mass in the Asymptotically de Sitter Space-Time Reviewed

    Classical and Quantum Gravity   11   2059 - 2071   1994.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1088/0264-9381/11/8/012

  • Dynamical Evolution of Gravitational Waves in the Asymptotically de Sitter Spacetime Reviewed

    Physical Review D   50   708 - 719   1994.07

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.50.708

  • Prohibition of Large Inhomogeneity in Preinflationary Stage Reviewed

    Physical Review D   49   3886 - 3892   1994.04

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.49.3886

  • A Cosmological Constant Limits the Size of Black Holes Reviewed International coauthorship

    Physical Review D   49   5080 - 5085   1994.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1103/PhysRevD.49.5080

  • Hoop Conjecture for Apparent Horizon Formation Reviewed

    Classical and Quantum Gravity   11   431 - 441   1994.02

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

    DOI: 10.1088/0264-9381/11/2/014

  • Can Large Black Holes Collide in de Sitter Space-Time? Reviewed

    Physical Review D   47   R3099 - R3102   1993.04

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Naked Singularity Dries Up? Reviewed

    Progress of Theoretical Physics   89   821 - 831   1993.04

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Apparent Horizons of N-Black Hole System in Space-Time with Cosmological Constant Reviewed

    Physical Review D   47   3203 - 3213   1993.04

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Numerical Study of Cosmic No Hair Conjecture II; Analysis of Initial Data Reviewed

    Physical Review D   47   3194 - 3202   1993.04

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Motion of a Dust Shell in the Space-Time with a Cosmological Constant Reviewed

    Progress of Theoretical Physics   88   1097 - 1105   1992.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Oppenheimer-Snyder Space-Time with a Cosmological Constant Reviewed

    General Relativity and Gravitation   23   1069 - 1081   1992.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Single Work  

  • The Constant Mean Curvature Slicing of the Schwarzschild-de Sitter Space-Time Reviewed

    Physical Review D   44   1326 - 1329   1991.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Numerical Study of Cosmic No Hair Conjecture; Formalism and Linear Analysis Reviewed

    Physical Review D   43   1788 - 1797   1991.03

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • (2+1)-Dimensional Quantum Gravity; Case of Torus Universe Reviewed

    Progress of Theoretical Physics   84   739 - 748   1990.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • (2+1)-Dimensional Pure Gravity for an Arbitrary Closed Initial Surface Reviewed

    Classical and Quantum Gravity   7   163 - 176   1990.02

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Stochastic Dynamics of New Inflation Reviewed

    Progress of Theoretical Physics   80   1041 - 1068   1988.12

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • Classical Behavior of a Scalar Field in the Inflationary Universe Reviewed

    Nuclear Physics B   308   868 - 884   1988.10

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

  • The Condition for the Classical Slow Rolling in New Inflation Reviewed

    Physics Letter B   209   197 - 201   1988.08

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    Publishing type:Research paper (scientific journal)   Kind of work:Joint Work  

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MISC

  • ベクトル解析と一般相対論/電磁気学を例として Invited

    中尾憲一

    日本評論社・数学セミナー   694   24 - 29   2019.07

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    Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Kind of work:Single Work  

  • Energy-momentum tensor Invited

    Ken-ichi Nakao

    53 ( 7 )   38 - 43   2015.07

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    Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Kind of work:Single Work  

  • Observational tests for the cosmological principle Invited Reviewed

    Chul-Moon Yoo, Ken-ichi Nakao

    BUTURI・The Physical Society of Japan   67 ( 1 )   37 - 43   2012.01

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    Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Kind of work:Single Work  

  • Cosmic censorship and black hole Invited

    Ken-ichi Nakao

    49 ( 12 )   37 - 43   2011.12

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    Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Kind of work:Single Work  

  • Death of white hole Invited Reviewed

    Ken-ichi Nakao

    MARUZEN/Parity   18 ( 5 )   52 - 56   2003.05( ISSN:0911-4815

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    Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Kind of work:Single Work  

  • Spacetime Singularities and Cosmic Censorship Hypothesis Invited Reviewed

    Ken-ichi Nakao

    BUTSURI   57 ( 1 )   22   2002

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    Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Kind of work:Single Work  

  • Gravitation and spacetime singularity Invited

    Ken-ichi Nakao

    36 ( 8 )   21 - 28   1998

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    Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Kind of work:Single Work  

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Presentations

  • Quantum particle creation in gravastar formation International conference

    Ken-ichi Nakao

    23rd International Conference on General Relativity and Gravitation  2022.07  Yangtze River Delta Physics Research Center

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    Presentation type:Oral presentation (general)  

    Venue:123 Zhongguancun Road, Liyang City, Jiangsu Province,China  

  • Spacetime singularities and black holes; cosmic censorship hypothesis Invited Domestic conference

    Ken-ichi Nakao

    The Physical Society of Japan, 2021 Annual (76th) Meeting   2021.03  The Physical Society of Japan

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    Presentation type:Oral presentation (general)  

    Venue:via Zoom online at Nagoya University  

  • Reflection on black hole Invited Domestic conference

    Ken-ichi Nakao

    Rironkon Sympsium 2020  2020.12 

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    Presentation type:Oral presentation (general)  

    Venue:via Zoom online at Nagoya University  

  • Gravastar formation: what can be the evidence of a black hole? Invited International conference

    Ken-ichi Nakao

    Workshop on gravitational collapse  2019.12  Pankaj S. Joshi

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    Presentation type:Oral presentation (invited, special)  

    Venue:International Center for Cosmology, Charotar University of Science and Technology  

  • What can be observed in strong gravity field?: especially on black hole Invited International conference

    Ken-ichi Nakao

    Workshop on astrophysics and cosmology  2019.12  Pankaj S. Joshi

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    Presentation type:Oral presentation (keynote)  

    Venue:International Center for Cosmology, Charotar University of Science and Technology  

  • What can be observed in strong gravity field?: especially on black hole Invited International conference

    Ken-ichi Nakao

    Annicersary General Meeting of The Indian National Science Academy  2019.12  The Indian National Science Academy

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    Presentation type:Oral presentation (invited, special)  

    Venue:Council of Scientific and Industrial Research - National Institute for Oceanography  

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Grant-in-Aid for Scientific Research

  • 高速回転する超コンパクト天体とその極近傍における物理過程の理論的研究

    Grant-in-Aid for Scientific Research(C)  2021.04

  • Study on relativistic inhomogeneous universe

    Grant-in-Aid for Scientific Research(C)  2013.04

  • Theoretical study on relativistic inhomogeneous universe

    Grant-in-Aid for Scientific Research(C)  2009.04

  • Theoretical study on stability and gravitational collapse of topological defects in higher dimensional theory of gravity

    Grant-in-Aid for Scientific Research(C)  2004.04

  • Theoretical study on gravitational collapse in scalar-tensor theory

    1996.04

  • Theoretical study on dynamical evolution of inhomogeneous universe

    1995.04

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Charge of on-campus class subject

  • Relativistic Theory of Gravitation

    2021     Graduate school

  • Advanced Research Course for Master's Thesis of Science

    2021     Graduate school

  • Exercises in Fundamental Physics

    2021     Graduate school

  • Advanced Research Course for Doctor's Thesis of Science

    2021     Graduate school

  • Basic Physics IV

    2021     Undergraduate

  • Mechanics 2

    2021     Undergraduate

  • Theory of Relativity

    2021     Undergraduate

  • Reading Seminar in Physics

    2021     Undergraduate

  • Advanced Theoretical Physics

    2021     Undergraduate

  • 相対論

    2024   Weekly class   Undergraduate

  • 現代物理学への招待

    2024   Weekly class   Undergraduate

  • 宇宙の流体力学

    2024   Weekly class   Graduate school

  • 物理学特別研究2A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究1A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習2A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習1A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究5A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究4A

    2024   Intensive lecture   Graduate school

  • 物理学特別研究3A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習5A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習4A

    2024   Intensive lecture   Graduate school

  • 物理学特別演習3A

    2024   Intensive lecture   Graduate school

  • 現代科学と人間

    2024   Weekly class   Graduate school

  • Relativity

    2022   Weekly class   Undergraduate

  • Advanced Theoretical Physics

    2020     Undergraduate

  • Reading Seminar in Physics

    2020     Undergraduate

  • Theory of Relativity

    2020     Undergraduate

  • Mechanics 2

    2020     Undergraduate

  • Basic Physics IV

    2020     Undergraduate

  • Exercises in Fundamental Physics

    2020     Graduate school

  • Advanced Research Course for Doctor's Thesis of Science

    2020     Graduate school

  • Advanced Research Course for Master's Thesis of Science

    2020     Graduate school

  • Relativistic Astrophysics

    2020     Graduate school

  • Basic Physics IV

    2019     Undergraduate

  • Exercises in Physics 2

    2019     Undergraduate

  • Mechanics 2

    2019     Undergraduate

  • Advanced Theoretical Physics

    2019     Undergraduate

  • Reading Seminar in physics

    2019     Undergraduate

  • Exercises in Fundamental Physics

    2019     Graduate school

  • Advanced Research Course for Master's Thesis of Science

    2019     Graduate school

  • Advanced Research Course for Doctoral Thesis of Science

    2019     Graduate school

  • Relativistic Theory of Gravitation

    2019     Graduate school

  • Advanced Theoretical Physics

    2018     Undergraduate

  • Reading Seminar in physics

    2018     Undergraduate

  • Advanced Research Course for Doctoral Thesis of Science

    2018     Graduate school

  • Advanced Research Course for Master's Thesis of Science

    2018     Graduate school

  • Exercises in Physics 2

    2018     Undergraduate

  • Basic Physics IV

    2018     Undergraduate

  • Exercises in Fundamental Physics

    2018     Graduate school

  • Mechanics 2

    2018     Undergraduate

  • Relativistic Astrophysics

    2018     Graduate school

  • Basic Physics IV

    2017     Undergraduate

  • Exercises in Physics 2

    2017     Undergraduate

  • Mechanics 2

    2017     Undergraduate

  • Reading Seminar in physics

    2017     Undergraduate

  • Advanced Theoretical Physics

    2017     Undergraduate

  • Exercises in Fundamental Physics

    2017     Graduate school

  • Advanced Research Course for Master's Thesis of Science

    2017     Graduate school

  • Advanced Research Course for Doctoral Thesis of Science

    2017     Graduate school

  • Relativistic Theory of Gravitation

    2017     Graduate school

▼display all

Charge of off-campus class subject

  • 基礎物理学I-A

    Institution:Osaka City University

  • 量子力学演習

    Institution:Osaka City University

  • 解析力学

    Institution:Osaka City University

  • 素核宇宙物理学2

    Institution:Osaka City University

  • 相対論

    Institution:Osaka City University

  • 現代物理学への招待

    Institution:Osaka City University

  • 基礎物理学II-A

    Institution:Osaka City University

  • 基礎物理学II

    Institution:Osaka City University

  • 基礎物理学I

    Institution:Osaka City University

  • ミクロとマクロの世界

    Institution:Osaka City University

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Original item・Special report (Education Activity)

  • 2021

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    Original item:学部2回生の担任を担当。各セメスターでの成績が出た後の面談。様々な相談の受付。

  • 2021

      More details

    Original item:学部担当科目に関する質問を随時受付。

Social Activities

  • Popular lecture at the Nehru Planetarium

    Role(s): Lecturer

    Nehru Centre  Nehru Centre, Mumbai, India  2015.03

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    Audience: High school students, University students, General public

    Type:Lecture

    Lecture on spacetime singularities predicted by general relativity

Visiting Lectures ⇒ Link to the list of Visiting Lectures

  • ブラックホールって何?

    Category:Modern system science (knowledge information system, environmental system, educational welfare, psychology), Commerce (management, public management), Economics, Law (law, politics, administration), Literature (literature, philosophy, history, art, human behavior, language, culture, society / gender), Science (mathematics, physics, chemistry, biology, geology, biochemistry), Engineering (machinery, electronics / physics, electrical / electronics, electrical information, chemical biotechnology, architecture, cities (civil engineering / environment), material chemistry, aerospace, marine systems, applied chemistry, chemistry, materials), Life sciences (food, nutrition science, living environment, human welfare), Agricultural science (applied biology, biofunctional chemistry, green space environmental science), Medicine (medical care, rehabilitation, health exercise science, physical fitness / training, sports practice science), Nursing (nursing, sex education), Veterinary

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    Audience:Junior high school students, High school students, General

    ブラックホールとは、アインシュタインが提案した一般相対論が予言する”天体”です。
    この講義では、一般相対論の簡単な説明から始め、ブラックホールとは何かをお話し、
    さらにブラックホールに関する最新の研究成果を紹介します。
    ブラックホールとは何かを理解してもらう

Original item・Special report (Social Activity)

  • 2022

      More details

    Original item:素粒子奨学会委員

    Special report:中村誠太郎賞の審査

  • 2022

      More details

    Original item:西宮湯川記念事業委員会委員

  • 2021

      More details

    Original item:素粒子奨学会委員

    Special report:中村誠太郎賞の審査

Foreigner acceptance

  • 2022

    foreigners accepted :2

  • 2021

    foreigners accepted :1

  • 2018

    foreigners accepted :1

  • 2017

    foreigners accepted :2

  • 2016

    foreigners accepted :5

  • 2015

    foreigners accepted :4

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International exchange activities

  • Theoretical study about various physical phenomena with strong gravity in the framework of General Relativity

    Field category :Research

    Country name :India   2009.03 - Now

Other

  • Job Career

    1999 - 2008

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    Osaka City University Graduate School of Science Associate Professor