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重力波源と波形の研究

Research Project

Project/Area Number 14047212
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionKyoto University

Principal Investigator

中村 卓史  京都大学, 大学院・理学研究科, 教授 (80155837)

Co-Investigator(Kenkyū-buntansha) 田中 貴浩  京都大学, 大学院・理学研究科, 助教授 (40281117)
柴田 大  東京大学, 大学院・総合文化研究科, 助教授 (80252576)
井岡 邦仁  京都大学, 大学院・理学研究科, 助手 (80402759)
原田 知広  京都大学, 大学院・理学研究科, 講師(研究機関研究員) (60402773)
大原 謙一  新潟大学, 理学部物理学科, 助教授 (00183765)
千葉 剛  京都大学, 大学院・理学研究科, 助手 (40324602)
西條 統之  京都大学, 大学院・理学研究科, 学振特別研究員
Project Period (FY) 2002 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥32,300,000 (Direct Cost: ¥32,300,000)
Fiscal Year 2005: ¥8,200,000 (Direct Cost: ¥8,200,000)
Fiscal Year 2004: ¥8,300,000 (Direct Cost: ¥8,300,000)
Fiscal Year 2003: ¥8,100,000 (Direct Cost: ¥8,100,000)
Fiscal Year 2002: ¥7,700,000 (Direct Cost: ¥7,700,000)
Keywords重力波 / インフレーション / 輻射反作用 / 数値相対論 / 中性子星 / カーター定数 / ガンマ線バースト / BBO / DECIGO / ダークエネルギー / 重力波メモリー効果 / ポストニュートン展開 / ブレーンワールド / 重力理論 / 重力レンズ / γ線バースト / 一般相対論 / ブラックホール
Research Abstract

(1)重力波放出による輻射反作用
重力波放出による輻射反作用は、相対論の永年の問題であると同時に、テンプレート作成のために解明されなければならない課題である。カーブラックホールまわりの軌道の発展を調べる上で重要なカーター定数の時間発展を計算する簡便な方法を本年度遂に発見した。更に、我々はその方法を用いて具体的なカーター定数の時間変化の公式の導出に世界で初めて成功した。
(2)数値相対論による中性子星合体のシミュレーション
数値相対論により現実的と考えられる状態方程式を用いて中性子星連星の合体をシミュレーションをおこなった。中性子星の質量を変えた計算の結果、閾値以上の質量においては、即座にブラックホール形成が起こるのに対して、閾値以下では扁平した巨大中性子星が形成されることを明らかにした。閾値の値は状態方程式の詳細により、2.5〜2.7太陽質量の間程度になる。巨大中性子星の形成後やがてブラックホールへと崩壊するまでの間3〜4kHzの重力波が100ms弱の間継続して放出され、100Mpc以内のイベントは将来の重力波干渉計における重力波源となる。
(3)ガンマ線バーストのジェットモデル
ガンマ線バーストは有力な重力波源であるが、その中心エンジンの性質はまだよくわかっていない。中心から放出されるジェットの形状がわかれば中心エンジンの解明に一歩近づくことができる。そこでジェットの形状によって観測量がどのように依存するかを調べた。特にジェットの表面が非一様な場合に注目し、ピークエネルギーと全エネルギーの関係、ピークエネルギーと最高光度の関係、継続時間などを観測と比較した。その結果、非一様なジェットモデルは観測をよく説明できることがわかった。またジェットの開き角の分布が開き角の逆2乗に比例する可能性を指摘した。

Report

(4 results)
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (39 results)

All 2006 2005 2004 Other

All Journal Article (27 results) Publications (12 results)

  • [Journal Article] Exact wave propagation in a spacetime with a cosmic string2006

    • Author(s)
      T.Suyama
    • Journal Title

      Physical Review D 73

      Pages: 24026-24026

    • Related Report
      2005 Annual Research Report
  • [Journal Article] The spectrum of gravitational waves in Randall-Sundrum braneworld cosmology2006

    • Author(s)
      T.Kobayashi
    • Journal Title

      Physical Review D 73

      Pages: 44005-44005

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Magnetized hypermassive neutron star collapse: a central engine for short gamma-ray bursts2006

    • Author(s)
      M.Shibata
    • Journal Title

      Physical Review Letters 96

      Pages: 31102-31102

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Collapse of magnetized hypermassive neutron stars in general relativity2006

    • Author(s)
      M.D.Duez
    • Journal Title

      Physical Review Letters 96

      Pages: 31101-31101

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Determination of the equation of the state of the Universe using 〜 0.1 Hz Gravitational Wave Detectors2005

    • Author(s)
      R.Takahashi
    • Journal Title

      Progress of Theoretical Physics 113

      Pages: 63-63

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Ep-Eiso relation in a multiple subjet model of gamma-ray bursts under the universal structured jet model and the Yonetoku relation2005

    • Author(s)
      K.Toma
    • Journal Title

      Astrophysical Journal 635

      Pages: 481-481

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A possible observational evidence for $theta^{-2}$ angular distribution of opening half angle of GRB jets2005

    • Author(s)
      D.Yonetoku
    • Journal Title

      Monthly Notice of Royal Astronomical Society 362

      Pages: 1114-1114

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A Possible Origin of Bimodal Distribution of Gamma-Ray Bursts2005

    • Author(s)
      K.Toma
    • Journal Title

      Astrophysical Journal 620

      Pages: 835-835

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Escape of black holes from the brane2005

    • Author(s)
      A.Flachi
    • Journal Title

      Physical Review Letters 95

      Pages: 161302-161302

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Adiabatic radiation reaction to the orbits in Kerr Spacetime2005

    • Author(s)
      N.Sago
    • Journal Title

      Progress of Theoretical Physics 114

      Pages: 509-509

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A new delta N formalism for multi-component inflation2005

    • Author(s)
      H.C.Lee
    • Journal Title

      JCAP 0510

      Pages: 4-4

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Quantum-mechanical generation of gravitational waves in braneworld2005

    • Author(s)
      T.Kobayashi
    • Journal Title

      Physical Review D 72

      Pages: 124028-124028

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A new analytical method for self-force regularization. II : Testing the efficiency for circular orbits2005

    • Author(s)
      W.Hikida
    • Journal Title

      Progress of Theoretical Physics 113

      Pages: 283-283

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Five-dimensional black strings in Einstein-Gauss-Bonnet gravity2005

    • Author(s)
      T.Kobayashi
    • Journal Title

      Physical Review D 71

      Pages: 84005-84005

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Are black holes over-produced during preheating?2005

    • Author(s)
      T.Suyama
    • Journal Title

      Physical Review D 71

      Pages: 63507-63507

    • Related Report
      2005 Annual Research Report
  • [Journal Article] The close limit analysis for head-on collision of two black holes in higher dimensions : Brill-Lindquist initial data2005

    • Author(s)
      H.Yoshino
    • Journal Title

      Physical Review D 72

      Pages: 84020-84020

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Robustness of a high-resolution central scheme for hydrodynamic simulations in full general relativity2005

    • Author(s)
      M.Shibata
    • Journal Title

      Physical Review D 72

      Pages: 47501-47501

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Magnetohydrodynamics in full general relativity : Formulation and tests2005

    • Author(s)
      M.Shibata
    • Journal Title

      Physical Review D 72

      Pages: 44014-44014

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Constraining nuclear equations of state using gravitational waves from hypermassive neutron stars2005

    • Author(s)
      M.Shibata
    • Journal Title

      Physical Review Letters 94

      Pages: 201101-201101

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Coherent Radiation in Gamma-Ray Bursts and Relativistic Collisionless Shocks2005

    • Author(s)
      K.Ioka
    • Journal Title

      Progress of Theoretical Physics 114

      Pages: 1317-1317

    • NAID

      110002975388

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Super-horizon primordial black holes2005

    • Author(s)
      T.Harada
    • Journal Title

      Physical Review D 72

      Pages: 44021-44021

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Gravitational wave memory of gamma-ray burst jets2004

    • Author(s)
      N.Sago, K.Ioka, T.Nakamura, R.Yamazaki
    • Journal Title

      Phys.Rev.D 70

      Pages: 104012-104012

    • NAID

      120000879691

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A Unified Model of Short and Long Gamma-Ray Bursts, X-Ray Rich Gamma-Ray Bursts, and X-Ray Flashes2004

    • Author(s)
      R.Yamazaki, K.Ioka, T.Nakamura
    • Journal Title

      Astrophys.J. 607

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Peak Energy-Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model2004

    • Author(s)
      R.Yamazaki, K.Ioka, T.Nakamura
    • Journal Title

      Astrophys.J. 606

    • NAID

      120000880592

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Near-Infrared Colors of Gamma-Ray Burst Afterglows and Cosmic Reionization History2004

    • Author(s)
      A.K.Inoue, R.Yamazaki, T.Nakamura
    • Journal Title

      Astrophys.J. 601

      Pages: 644-644

    • NAID

      120000882158

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Leading order corrections to the cosmological evolution of tensor perturbations in braneworld2004

    • Author(s)
      T.Kobayashi, T.Tanaka
    • Journal Title

      JCAP 410

      Pages: 15-15

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A new analytical method for self-force regularization. I : Scalar charged particle in Schwarzschild spacetime2004

    • Author(s)
      Hikida et al.
    • Journal Title

      Prog.Theor.Phys. 111

      Pages: 821-821

    • Related Report
      2004 Annual Research Report
  • [Publications] T.Kobayashi, H.Kudoh, T.Tanaka: "PRIMORDIAL GRAVITATIONAL WAVES IN INFLATIONARY BRAKE WORLD"Phys.Rev.D. 68. 044025 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kaiki T.Inoue, T.Tanaka: "GRAVITATIONAL WAVES FROM SUBLUNAR MASS PRIMORDIAL BLACK HOLE BINARIES : A NEW PROBE OF EXTRADIMENSIONS"Phys.Rev.Lett.. 91. 021101 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Kudoh, T.Tanaka, T.Nakamura: "SMALL LOCALIZED BLACK HOLES IN BRANE WORLD : FORMULATION AND NUMERICAL METHOD"Phys.Rev.D. 68. 024035 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Ryuichi Takahashi, Takashi Nakamura: "DECI HERTZ LASER INTERFEROMETER CAN DETERMINE THE POSITION OF THE COALESCING BINARY NEUTRON STARS WITHIN AN ARC MINUTE A WEEK BEFORE THE FINAL MERGING EVENT TO BLACK HOLE"Astrophys.J.Lett.. 596. L231 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Ryuichi Takakashi, Takashi Nakamura: "WAVE EFFECTS IN GRAVITATIONAL LENSING OF GRAVITATIONAL WAVES FROM CHIRPING BINARIES."Astrophys.J.. 595. 1039 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sanjay Jhingan, Takahiro Tanaka: "IMPROVEMENT ON THE METRIC RECONSTRUCTION SCHEME IN REGGE-WHEELER-ZERILLI FORMALISM"Phys.Rev.D. 67. 104018 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 中村 卓史 他: "A possible Origin of log normal ・・・"Astrophysical Journal. 570. 21-24 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中村 卓史 他: "X-ray flashes from off axis GRBS"Astrophysical Journal. 571. 31-35 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中村 卓史 他: "Is the dark energy the only ・・・"Prog. Theor. Phys.. 108. 809-818 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中村 卓史 他: "Delayed Flashes from off axis ・・・"Astrophysical Journal. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] 千葉 剛 他: "Lens Model Degeneracy and ・・・"Prog. Theor. Phys.. 107. 625-630 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 田中 貴浩 他: "Cosmological perturbation ・・・"Phys. Rev, D. D65. 104034 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2018-03-28  

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