Current Affiliation Organization 【 display / non-display 】

Current Affiliation Organization 【 display / non-display 】

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University 【 display / non-display 】

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External Career 【 display / non-display 】

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Research Areas 【 display / non-display 】

Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Equilibriums of extremely magnetized compact stars with force-free magnetotunnels

  Kōji Uryū, Shijun Yoshida, Eric Gourgoulhon, Charalampos Markakis, Kotaro Fujisawa, Antonios Tsokaros, Keisuke Taniguchi, Mina Zamani

  Physical Review D ( Physical Review D )  107 ( 10 ) 103016-1 - 103016-14   2023.05 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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    DOI

• Reducing orbital eccentricity in initial data of black hole-neutron star binaries in the puncture framework

  Kyutoku Koutarou, Kawaguchi Kyohei, Kiuchi Kenta, Shibata Masaru, Taniguchi Keisuke

  PHYSICAL REVIEW D ( Physical Review D )  103 ( 2 ) 023002-1 - 023002-15   2021.01 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• New code for equilibriums and quasiequilibrium initial data of compact objects. IV. Rotating relativistic stars with mixed poloidal and toroidal magnetic fields

  Koji Uryu, Shijun Yoshida, Eric Gourgoulhon, Charalampos Markakis, Kotaro Fujisawa, Antonios Tsokaros, Keisuke Taniguchi, Yoshiharu Eriguchi

  Physical Review D ( Physical Review D )  100 ( 12 ) 123019-1 - 123019-34   2019.12 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Revisiting the Lower Bound on Tidal Deformability Derived by AT 2017gfo

  Kenta Kiuchi, Koutarou Kyutoku, Masaru Shibata, Keisuke Taniguchi

  Astrophysical Journal Letters ( Astrophysical Journal Letters )  876 ( 2 ) L31-1 - L31-6   2019.05 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Frequency-domain gravitational waveform models for inspiraling binary neutron stars

  Kyohei Kawaguchi, Kenta Kiuchi, Koutarou Kyutoku, Yuichiro Sekiguchi, Masaru Shibata, Keisuke Taniguchi

  Physical Review D ( Physical Review D )  97 ( 4 ) 044044-1 - 044044-22   2018.02 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• Coalescence of black hole-neutron star binaries

  Kyutoku Koutarou, Shibata Masaru, Taniguchi Keisuke

  Living Reviews in Relativity   24 ( 1 ) 1 - 182   2021.12  [Refereed]

   

  DOI

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

  Kawamura Seiji, et al.

  Progress of Theoretical and Experimental Physics   2021 ( 5 )   2021.05  [Refereed]

   

  DOI

• Space gravitational-wave antennas DECIGO and B-DECIGO

  Seiji Kawamura, Takashi Nakamura, Masaki Ando, Naoki Seto, Tomotada Akutsu, Ikkoh Funaki, Kunihito Ioka, Nobuyuki Kanda, Isao Kawano, Mitsuru Musha, Kazuhiro Nakazawa, Shuichi Sato, Takeshi Takashima, Takahiro Tanaka, Kimio Tsubono, Jun'ichi Yokoyama, Kazuhiro Agatsuma, Koh-suke Aoyanagi, Koji Arai, Akito Araya, Naoki Aritomi, Hideki Asada, Yoichi Aso, Dan Chen, Takeshi Chiba, Toshikazu Ebisuzaki, Satoshi Eguchi, Yumiko Ejiri, Motohiro Enoki, Yoshiharu Eriguchi, Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro Fukushima, Toshifumi Futamase, Rina Gondo, 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, Hideki Ishihara, Takehiko Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke Itoh, Kiwamu Izumi, Shinya Kanemura, 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, Sachiko Kuroyanagi, Kei-ichi Maeda, Hideo Matsuhara, Nobuyuki Matsumoto, Yuta Michimura, Osamu Miyakawa, Umpei Miyamoto, Shinji Miyoki, Mutsuko Y. Morimoto, Toshiyuki Morisawa, Shigenori Moriwaki, Shinji Mukohyama, Shigeo Nagano, Kouji Nakamura, Hiroyuki Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori Nakayama, Erina Nishida, Atsushi Nishizawa, Yoshito Niwa, Taiga Noumi, Yoshiyuki Obuchi, Naoko Ohishi, Masashi Ohkawa, Kenshi Okada, Norio Okada, Koki Okutomi, Kenichi Oohara, Norichika Sago, Motoyuki Saijo, Ryo Saito, Masaaki Sakagami, Shin-ichiro Sakai, Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru Shibata, Kazunori Shibata, Ayumi Shimo-oku, Hisaaki Shinkai, Ayaka Shoda, Kentaro Somiya, Hajime Sotani, Aru Suemasa, Naoshi Sugiyama, Yudai Suwa, Rieko Suzuki, Hideyuki Tagoshi, Fuminobu Takahashi, Kakeru Takahashi, Keitaro Takahashi, Ryutaro Takahashi, Ryuichi Takahashi, Hirotaka Takahashi, Takamori Akiteru, Tadashi Takano, Nobuyuki Tanaka, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki Tashiro, Yasuo Torii, Morio Toyoshima, Shinji Tsujikawa, Akitoshi Ueda, Ken-ichi Ueda, Takafumi Ushiba, Masayoshi Utashima, Yaka Wakabayashi, Kent Yagi, Kazuhiro Yamamoto, Toshitaka Yamazaki, Chul-Moon Yoo, Shijun Yoshida, Taizoh Yoshino

  International Journal of Modern Physics D   28 ( 12 )   2019.09  [Refereed]

   

  DOI

• Coalescence of Black Hole-Neutron Star Binaries

  Shibata Masaru, Taniguchi Keisuke

  Living Reviews in Relativity   14 ( 1 )   2011  [Refereed]

   

  DOI

• Location of the innermost stable circular orbit of binary neutron stars in the post Newtonian approximations of general relativity

  Shibata M, Taniguchi K, Nakamura T

  PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT   ( 128 ) 295 - 333   1997

   

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

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

  Project Year: 2024.04  -  2027.03 

  Direct: 3,300,000 (YEN)  Overheads: 990,000 (YEN)  Total: 4,290,000 (YEN)

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

  Project Year: 2021.04  -  2024.03 

  Direct: 2,700,000 (YEN)  Overheads: 810,000 (YEN)  Total: 3,510,000 (YEN)

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

  Project Year: 2017.04  -  2020.03 

  Direct: 3,400,000 (YEN)  Overheads: 1,020,000 (YEN)  Total: 4,420,000 (YEN)

• A numerical study of relativistic compact binaries in quasi-equilibrium

  Grant-in-Aid for Scientific Research(C)

  Project Year: 2014.04  -  2017.03 

  Member: TANIGUCHI Keisuke

  Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

  　View Summary

  Compact binary systems gradually decrease their orbital separations and eventually merge due to the emission of gravitational waves. There, however, exists a state which can be regarded as quasi-equilibrium in the evolutionary sequence of the binaries, because the time-scale of the orbital decay is much longer than the orbital period. In this research program, we have developed a numerical code to accurately solve Poisson-like equations by using a spectral method. First, we developed a code to perform spectral expansion and confirmed its accuracy. Then, we implemented a numerical code to solve Poisson-like equations, an essential part to obtain quasi-equilibrium figures of compact binaries, using the bi-spherical coordinates.

• A numerical study of quasi-equilibrium black hole-neutron star binaries in general relativity

  Grant-in-Aid for Research Activity start-up

  Project Year: 2010  -  2011 

  Member: TANIGUCHI Keisuke

  Direct: 2,400,000 (YEN)  Overheads: 720,000 (YEN)  Total: 3,120,000 (YEN)

  　View Summary

  Binary systems composed of a black hole and a neutron star cannot be in stationary state due to the emission of gravitational waves. There, however, exists a state which can be regarded as quasi-equilibrium, because the time-scale of the orbital decay is much longer than the orbital period. In this research program, we have developed a numerical code to construct relativistic black hole-neutron star binaries in quasi-equilibrium. In particular, we have found a method to include a rapidly spinning black hole in a black hole-neutron star binary.

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