ガンマ線バースト・極超新星に於ける爆発的元素合成

• Project Area: Research on the Emergence of Hierarchical Structure of Matter by Bridging Particle, Nuclear and Astrophysics in Computational Science
• Project/Area Number: 23105709
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Kyoto University
• Principal Investigator: 長滝 重博 京都大学, 基礎物理学研究所, 准教授 (60359643)
• Project Period (FY): 2011-04-01 – 2013-03-31
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: ガンマ線バースト / 極超新星爆発 / ブラックホール / 爆発的元素合成 / Ｒ－Ｐｒｏｃｅｓｓ元素合成 / コラプサー / 一般相対性理論 / 一般相対論

Outline of Annual Research Achievements

ガンマ線バースト・極超新星の発生メカニズムは未解明なことが多く、極超新星の明るさを決定している56Niがいつ、どこで、どれだけ生成されているのか解明出来ていません。その原因は、コラプサーのダイナミクスをシミュレートするグループと、元素合成のシミュレーションを行っているグループがそれぞれ別個の計算をしており、ガンマ線バースト・極超新星の統一的な描像が描けていない点にあります。この状況を打開するため、本研究では極超新星に於ける56Ni生成問題をコラプサーのダイナミクスと絡めて研究するという、世界初の試みを展開します。これにより極超新星の56Niがいつ、どこで、どれだけ出来るかということを明らかにします。また、ガンマ線バーストジェット領域は高エントロピー領域となることが期待されますので、R-process元素合成が起こる可能性を検証します。本年度は、原子核ネットワークを流体コードに組み込むことに成功し、ジェット状超新星爆発に於ける56Niの生成量を従来よりも正確に求めることに成功しました。ネットワークはまだ小さく、原子核同位体の組成比を議論することは出来ない状態ですが、流体計算と原子核ネットワークを組み合わせることが出来たことは大きな進展と言うことが出来ます。今後更にネットワークを広げ、より正確にコラプサーモデルに於ける56Ni, R-process核の生成を議論出来る展望を持つことが出来ました。

Research Progress Status

24年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

24年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Modeling high-energy light curves of the PSR B1259-63/LS 2883 binary based on 3D SPH simulation (2012)
  • Author(s): 高田順平, 他
  • Journal Title: Astrophysical Journal Volume: 750 Issue: 1 Pages: 70-79
  • DOI: 10.1088/0004-637x/750/1/70
  • Peer Reviewed
• [Journal Article] A Generalized Model of Nonlinear Diffusive Shock Acceleration Coupled to an Evolving Supernova Remnant (2012)
  • Author(s): Lee, Shiu-Hang; Ellison, Donald C. ; Nagataki, Shigehiro
  • Journal Title: The Astrophysical Journal Volume: 750 Issue: 2 Pages: 13-13
  • DOI: 10.1088/0004-637x/750/2/156
  • Peer Reviewed
• [Journal Article] Icecube Nondetection of Gamma-Ray Bursts: Constraints on the Fireball Properties (2012)
  • Author(s): He, Hao-Ning; Liu, Ruo-Yu; Wang, Xiang-Yu; Nagataki, Shigehiro; Murase, Kohta; Dai, Zi-Gao
  • Journal Title: The Astrophysical Journal Volume: 752 Issue: 1 Pages: 10-10
  • DOI: 10.1088/0004-637x/752/1/29
  • Peer Reviewed
• [Journal Article] Origins of short gamma-ray bursts deduced from offsets in their host galaxies revisited (2012)
  • Author(s): Cui, Xiao-Hong; Nagataki, Shigehiro: Aoi, Junichi ; Xu, Ren-Xin
  • Journal Title: Research in Astronomy and Astrophysics Volume: 12 Issue: 9 Pages: 1255-1268
  • DOI: 10.1088/1674-4527/12/9/006
  • Peer Reviewed
• [Journal Article] A high-resolution study of the X-ray emission and Sunyaev-Zel'dovich effect in the Bullet cluster (1E 0657-56) (2012)
  • Author(s): Prokhorov, D. A. ; Million, E. T. ; Akahori, T. ; Zemcov, M. ; Moraghan, A. ; Nagataki, S. ; Yoshikawa, K. ; Colafrancesco, S. ; Rawle, T. D. ; Egami, E.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 426 Issue: 3 Pages: 2291-2299
  • DOI: 10.1111/j.1365-2966.2012.21842.x
  • Peer Reviewed
• [Journal Article] Failed Gamma-Ray Bursts: Thermal Ultraviolet/Soft X-Ray Emission Accompanied by Peculiar Afterglows (2012)
  • Author(s): Xu, M. ; Nagataki, S. ; Huang, Y. F. ; Lee, S.-H.
  • Journal Title: The Astrophysical Journal Volume: 746 Issue: 1 Pages: 49-49
  • DOI: 10.1088/0004-637x/746/1/49
  • Peer Reviewed
• [Journal Article] Can electron distribution functions be derived through the Sunyaev-Zel'dovich effect? (2011)
  • Author(s): Prokhorov, D. A., Colafrancesco, S., Akahori, T., Yoshikawa, K., Nagataki, S., Seon, K.-I.
  • Journal Title: Astronomy & Astrophysics Volume: 529 Pages: A39-A39
  • DOI: 10.1051/0004-6361/201016036
  • Peer Reviewed
• [Journal Article] Thermal Radiation from Gamma-ray Burst Jets (2011)
  • Author(s): Mizuta, A., Nagataki, S., Aoi, J.
  • Journal Title: The Astrophysical Journal Volume: 732 Issue: 1 Pages: 26-26
  • DOI: 10.1088/0004-637x/732/1/26
  • Peer Reviewed
• [Journal Article] An Off-axis Relativistic Jet Model for the Type Ic Supernova SN 2007gr (2011)
  • Author(s): Xu, M. ; Nagataki, S. ; Huang, Y. F
  • Journal Title: The Astrophysical Journal Volume: 735 Issue: 1 Pages: 3-3
  • DOI: 10.1088/0004-637x/735/1/3
  • Peer Reviewed
• [Journal Article] Unveiling the 3D temperature structure of galaxy clusters by means of the thermal Sunyaev-Zel'dovich effect (2011)
  • Author(s): Prokhorov, D. A. ; Colafrancesco, S. ; Akahori, T. ; Million, E. T. ; Nagataki, S. ; Yoshikawa, K.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 415 Issue: 3 Pages: 2505-2512
  • DOI: 10.1111/j.1365-2966.2011.18875.x
  • Peer Reviewed
• [Journal Article] Hydrodynamic Interaction between the Be Star and the Pulsar in the TeV Binary PSR B1259-63/LS 2883 (2011)
  • Author(s): Okazaki, Atsuo T.; Nagataki, Shigehiro; Naito, Tsuguya; Kawachi, Akiko; Hayasaki, Kimitake; Owocki, Stanley P.; Takata, Jumpei
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 63 Pages: 893-901
  • NAID: 10029582033
  • Peer Reviewed
• [Journal Article] A high-frequency study of the Sunyaev-Zel'dovich effect morphology in galaxy clusters (2011)
  • Author(s): Prokhorov, D. A. ; Colafrancesco, S. ; Akahori, T. ; Million, E. T. ; Nagataki, S. ; Yoshikawa, K.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 416 Pages: 302-310
  • DOI: 10.1111/j.1365-2966.2011.19037.x
  • Peer Reviewed
• [Journal Article] Rotating Black Holes as Central Engines of Long Gamma-Ray Bursts: Faster is Better (2011)
  • Author(s): Nagataki, Shigehiro
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 63 Pages: 1243-1249
  • NAID: 10030385458
  • Peer Reviewed
• [Presentation] Gamma-Ray Bursts, Are you Angles or Fallen Angels? (2013)
  • Author(s): Shigehiro Nagataki
  • Organizer: Kyoto University GCOE Symposium 2013
  • Place of Presentation: 京都大学、京都
  • Year and Date: 2013-02-14
  • Invited
• [Presentation] 私の高エネルギー天体物理学 (2012)
  • Author(s): 長瀧重博
  • Organizer: 高エネルギー天体物理研究会
  • Place of Presentation: 首都大学東京、東京
  • Year and Date: 2012-12-16
• [Presentation] Toward Unveiling the Explosion Mechanism of Gamma-Ray Burst (2012)
  • Author(s): Shigehiro Nagataki
  • Organizer: Kyoto University #8211; Durham University Joint International Symposium 2012
  • Place of Presentation: 京都大学、京都
  • Year and Date: 2012-11-27
  • Invited
• [Presentation] ガンマ線バースト中心エンジンの3次元シミュレーション (2012)
  • Author(s): 長瀧重博
  • Organizer: ガンマ線バースト会議
  • Place of Presentation: 金沢市民会館、金沢
  • Year and Date: 2012-11-01
• [Presentation] Life of Long Gamma-Ray Bursts: From Explosion to Remnants (2012)
  • Author(s): Shigehiro Nagataki
  • Organizer: PACIFIC２０１２
  • Place of Presentation: モーレア、フレンチポリネシア
  • Year and Date: 2012-09-01
  • Invited
• [Presentation] Aspherical Supernova Explosion and Gamma-Ray Bursts (2012)
  • Author(s): Shigehiro Nagataki
  • Organizer: ExUL-2012 GRB Workshop
  • Place of Presentation: モスクワ、ロシア
  • Year and Date: 2012-06-14
  • Invited
• [Presentation] Numerical Simulations of Central Engine of Long Gamma-Ray Bursts (2012)
  • Author(s): Shigehiro Nagataki
  • Organizer: Ginzburg Conference on Physics
  • Place of Presentation: モスクワ、ロシア
  • Year and Date: 2012-06-02
  • Invited
• [Presentation] Collapsar and Magnetar Models for Long-Duration Gamma-Ray Bursts (2012)
  • Author(s): Shigehiro Nagataki
  • Organizer: Gamma-Ray Burst Conference 2012
  • Place of Presentation: ミュンヘン、ドイツ
  • Year and Date: 2012-05-08
  • Invited
• [Presentation] Numerical Propagation of UHECRs: Spectrum, Arrival Direction, Composition
  • Author(s): Shigehiro Nagataki
  • Organizer: Multi-Messenger Astronomy of Cosmic Rays
  • Place of Presentation: 北京、中国
  • Invited
• [Presentation] Numerical Propagation of UHECRs: Spectrum, Arrival Direction, Composition
  • Author(s): Shigehiro Nagataki
  • Organizer: 32nd International Cosmic-Ray Conference
  • Place of Presentation: 北京、中国
• [Presentation] Numerical Study of Propagation of UHECRs
  • Author(s): Shigehiro Nagataki
  • Organizer: Particle Astrophysics and Cosmology Including Fundamental InteraCtions (PACIFIC ) 2011
  • Place of Presentation: モーレア、フレンチポリネシア
  • Invited
• [Presentation] General Relativistic MHD Simulations of Collapsars: Dynamics and Explosive Nucleosynthesis
  • Author(s): Shigehiro Nagataki
  • Organizer: 16th Nuclear Astrophysics
  • Place of Presentation: テガンセー、ドイツ
• [Presentation] General Relativistic MHD Simulations of Collapsars: Dynamics and Explosive Nucleosynthesis
  • Author(s): Shigehiro Nagataki
  • Organizer: International Workshop on Particles and Radiation from Cosmic Accelerators CA2012
  • Place of Presentation: 千葉大学、千葉
  • Invited
• [Presentation] ガンマ線バースト中心エンジンに関する理論的・数値的研究
  • Author(s): 長瀧重博
  • Organizer: 研究会「超新星爆発と数値シミュレーション」
  • Place of Presentation: 京都大学、京都
  • Invited
• [Presentation] 私の高エネルギー天体物理学
  • Author(s): 長瀧重博
  • Organizer: 研究会「高エネルギー宇宙物理学研究会」
  • Place of Presentation: 大阪大学、大阪
  • Invited
• [Presentation] ガンマ線バースト中心エンジンに関する理論的研究
  • Author(s): 長瀧重博
  • Organizer: 研究会「ガンマ線バーストで読み解く太古の宇宙」
  • Place of Presentation: 東京工業大学、東京