Binary neutron star mergers and short gamma-ray bursts

• Project/Area Number: 22740178
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyoto University
• Principal Investigator: KIUCHI Kenta 京都大学, 基礎物理学研究所, 特定研究員 (40514196)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 宇宙物理 / 重力波 / 一般相対性理論

Research Abstract

We theoretically investigated binary neutron star mergers by Numerical Relativity. We found that such an event could be detected by the gravitational wave observatory KAGRA and Advanced LIGO if it happened within the distance of about fifteen millions light years. We found that neutrinos from such a event could be simultaneously detected by the Hyper-Kamiokande as well. We quantitatively showed that the gravitational waves can assess the so-called merger hypothesis of gamma-ray bursts. If neutron stars have a magnetic field as large as that of magnetars, the amplified magnetic field by the magnetic winding can produce a poynting flux whose amplitude is as large as that of short-gamma ray burst.

Research Products

• [Journal Article] Effects of hyperons in binary neutron star mergers (2011)
  • Author(s): Yuichiro Sekiguchi, Kenta Kiuchi, Koutarou Kyutoku, Masaru Shibata
  • Journal Title: Physical Review Letters Volume: 107 Issue: 21 Pages: 1-5
  • DOI: 10.1103/physrevlett.107.211101
  • Peer Reviewed
• [Journal Article] Gravitational waves and neutrino emission from the merger of binary neutron stars (2011)
  • Author(s): Yuichiro Sekiguchi, Kenta Kiuchi, Koutarou Kyutoku, Masaru Shibata
  • Journal Title: Physical Review Letters Volume: 107 Issue: 5 Pages: 1-5
  • DOI: 10.1103/physrevlett.107.051102
  • Peer Reviewed
• [Journal Article] Gravitational waves from the Papaloizou-Pringle instability in black hole-torus systems (2011)
  • Author(s): K.Kiuchi, M.Shibata, et al
  • Journal Title: Physical Review Letters Volume: 106 Issue: 25 Pages: 251102-251102
  • DOI: 10.1103/physrevlett.106.251102
  • Peer Reviewed
• [Journal Article] Binary neutron star mergers : dependence on the nuclear equation of state (2011)
  • Author(s): Kenta Hotokezaka, Koutarou Kyutoku, Hirotada Okawa, Masaru Shibata, Kenta Kiuchi
  • Journal Title: Physical Review D Volume: 83 Issue: 12 Pages: 1-12
  • DOI: 10.1103/physrevd.83.124008
  • Peer Reviewed
• [Journal Article] Afterglow of binary neutron star merger (2011)
  • Author(s): M.Shibata, et al
  • Journal Title: Astrophysical Journal Letters Volume: 734 Issue: 2 Pages: L36-L36
  • DOI: 10.1088/2041-8205/734/2/l36
  • Peer Reviewed
• [Journal Article] Non-axisymmetric instabilities of neutron star with toroidal magnetic fields (2011)
  • Author(s): Kenta Kiuchi, Shijun Yoshida and Masaru Shibata
  • Journal Title: Astron. Astrophys Volume: 532
• [Journal Article] Truncated Moment Formalism for Radiation Hydrodynamics in Numerical Relativity (2011)
  • Author(s): Masaru Shibata, Kenta Kiuchi
  • Journal Title: Prog. Theo. Phys Volume: 125 Issue: 6 Pages: 1255-1255
  • DOI: 10.1143/ptp.125.1255
  • NAID: 110008685834
  • Peer Reviewed
• [Journal Article] Jet propagations, breakouts and photospheric emissions in collapsing massive progenitors of long duration gamma ray bursts (2011)
  • Author(s): Hiroki Nagakura, Hirotaka Ito, Kenta Kiuchi and Shoichi Yamada
  • Journal Title: Astrophys. J Volume: 731 Pages: 80-80
• [Journal Article] ncated Moment Formalism for Radiation Hydrodynamics in Numerical Relativ (2011)
  • Author(s): Masaru Shibata
  • Journal Title: Progress of Theoretical Physics Volume: 125 Pages: 1255-1287
  • Peer Reviewed
• [Journal Article] Jet propagations, breakouts and photospheric emissions in collapsing massive progenitors of long duration gamma ray burst (2011)
  • Author(s): Hiroki Nagakura
  • Journal Title: Astrophysical Journal Volume: 731
  • Peer Reviewed
• [Journal Article] Jet propagations, breakouts and photospheric emissions in collapsing massive progenitors of long duration gamma ray bursts (2011)
  • Author(s): H.Nagakura, H.Ito, K.Kiuchi, S.Yamada
  • Journal Title: Astrophysical Journal Volume: 730
  • Peer Reviewed
• [Presentation] Recent research progress of Numerical Relativity group in Kyoto University (2011)
  • Author(s): Kenta Kiuchi
  • Organizer: Quark to Supernova
  • Place of Presentation: 熱川(静岡)
  • Year and Date: 2011-11-28
• [Presentation] Gravitational waves and neutrino emission from the merger of binary neutron stars (2011)
  • Author(s): Kenta Kiuchi
  • Organizer: JGRG21
  • Place of Presentation: Tohoku University(Sendai)
  • Year and Date: 2011-09-25
• [Presentation] Gravitational waves and neutrino emission from the merger of binary neutron stars (2011)
  • Author(s): Kenta Kiuchi
  • Organizer: JGRG21
  • Place of Presentation: Tohoku University (Sendai)
  • Year and Date: 2011-09-25
• [Presentation] 重力波で探るガンマ線バーストの中心動力源 (2011)
  • Author(s): 木内建太
  • Organizer: 日本天文学会2011年秋季年会
  • Place of Presentation: 鹿児島大学(鹿児島)
  • Year and Date: 2011-09-19
• [Presentation] ブラックホール円盤系におけるPapaloizou-Pringle不安定性と重力波 (2011)
  • Author(s): 木内建太
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 弘前大学(青森)
  • Year and Date: 2011-09-16
• [Presentation] Gravitational waves and neutrino emission from the merger of binary neutron stars (2011)
  • Author(s): Kenta Kiuchi
  • Organizer: NRDA(招待講演)
  • Place of Presentation: Cardiff University(Wales)
  • Year and Date: 2011-07-10
• [Presentation] Gravitational waves and neutrino emission from the merger of binary neutron stars (2011)
  • Author(s): Kenta Kiuchi
  • Organizer: NRDA
  • Place of Presentation: Cardiff University (UK)(招待講演)
  • Year and Date: 2011-07-10
• [Presentation] Gravitational waves and neutrino emission from the merger of binary neutron stars (2011)
  • Author(s): Kenta Kiuchi
  • Organizer: ASTRONUM2011
  • Place of Presentation: Valencia(Spain)
  • Year and Date: 2011-06-17
• [Presentation] Gravitational waves and neutrino emission from the merger of binary neutron stars (2011)
  • Author(s): Kenta Kiuchi
  • Organizer: ASTRONUM2011
  • Place of Presentation: Valencia (Spain)
  • Year and Date: 2011-06-17
• [Presentation] 重力波によるガンマ線バースト中心エンジンの検証 (2011)
  • Author(s): 木内建太
  • Organizer: 超新星研究会2011
  • Place of Presentation: 国立天文台(東京)
  • Year and Date: 2011-03-01
• [Presentation] 数値相対論で解き明かす一般相対論的天体現象 (2011)
  • Author(s): 木内建太
  • Organizer: HPCS2011
  • Place of Presentation: 産業技術総合研究所、つくば市
  • Year and Date: 2011-01-19
• [Presentation] 数値的相対論で解き明かす一般相対論的天体現象 (2011)
  • Author(s): 木内建太
  • Organizer: HPCS2011
  • Place of Presentation: 産業技術総合研究所(茨城)
  • Year and Date: 2011-01-18
• [Presentation] Non-axisymmetric instability of toroidal magnetic fields in neutron stars (2010)
  • Author(s): Kenta Kiuchi
  • Organizer: EANAM2010
  • Place of Presentation: Taipei(Taiwan)
  • Year and Date: 2010-11-02
• [Presentation] Non-axisymmetric instability of toroidal magnetic fields in neutron stars (2010)
  • Author(s): Kenta Kiuchi
  • Organizer: Spanish Relativity Meeting
  • Place of Presentation: Granada(Spain)
  • Year and Date: 2010-09-06