SUPERNOVAE DUE TO MAGNETO-HYDRODYNAMICAL EXPLOSIONS RELATED TO THE FORMATION OF NEUTRON STARS AND NUCLEOSYNTHESIS

• Project/Area Number: 18540279
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyushu University
• Principal Investigator: HASHIMOTO Masa-aki Kyushu University, 大学院・理学研究院, 教授 (20228422)
• Project Period (FY): 2006 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥2,920,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥420,000); Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
• Keywords: 宇宙物理 / 超新星 / 元素合成 / 中性子星 / 磁気流体力学 / 回転星 / 恒星進化 / ニュウートリノ / 放射性元素 / 銀河の化学進化 / 太陽系組成 / 高密度天体 / 磁気回転流体 / ニュートリノ / QCD相転移 / 重力波 / ガンマー線バースト / 高密度星 / 磁気流体

Research Abstract

超新星爆発の磁気回転爆発シミュレーションを行い、爆発に伴う重元素合成、爆発的元素合成のシミュレーションを原子核合成のプログラム、核反応ネットワークを開発して遂行した。計算の初期モデルとして、従来、我々が開発してきた大質量星の進化の最終段階のモデルを数値 流体の計算に適合するように再構築し、星のコア部分に回転と磁場を与えた。その結果、軽元素を除くほとんどの元素が太陽系組成比に匹敵するほど生成されることが分かった。また、ほとんどの場合、中性子星形成には至らなかった。

Research Products

• [Journal Article] Hashimoto Nucleosynthesis in Magnegically Driven Jets from Collapsars (2008)
  • Author(s): S. Fujimoto, N. Nishimura, M. Hashimoto
  • Journal Title: The Astrophysical Journal 680 Pages: 1350-1358
  • Peer Reviewed
• [Journal Article] Cosmic microwave background constraints on a decaying cosmological term related to the thermal evolution (2008)
  • Author(s): R. Nakamura, M. Hashimoto, K. Ichiki
  • Journal Title: Physical Reviw D 77 Pages: 1-8
  • Peer Reviewed
• [Journal Article] Physics Reports of Kumamoto (2008)
  • Author(s): M. Ono, M. Hashimoto, S. Fujimoto, K. Arai
  • Journal Title: University 13 Pages: 33-46
• [Journal Article] Nucleosynthesis in magnetically driven jets from collapsars (2008)
  • Author(s): S. Fujimoto, N. Nishimura M. Hashimoto
  • Journal Title: The Astrophysical Journal 680 Pages: 1350-1358
  • Peer Reviewed
• [Journal Article] Nucleosynthesis in a Helium Star of 32M Related to MHD Jet of Supernova Explosions (2008)
  • Author(s): M. Ono, M. Hashimoto, S. Fujimoto, K. Arai
  • Journal Title: Physics Reports of Kumamoto University 13 Pages: 33-46
  • NAID: 110006967804
• [Journal Article] Nucleosynthesis in Magnegically Driven Jets from Collapsars (2008)
  • Author(s): S. Fujimoto, N. Nishimura, M. Hashimoto
  • Journal Title: The Astrophysical Journal (In press)
  • Peer Reviewed
• [Journal Article] Heavy element nucleosynthesis in a Collapsar (2007)
  • Author(s): S. Fujimoto, M. Hashimoto, K. Kotoke, S. Yamada
  • Journal Title: The Astrophysical Journal 656 Pages: 383-392
  • Peer Reviewed
• [Journal Article] Effects of QCD phase transition on the gravitational radiation from the magneto-rotational core collapse of massive stars (2007)
  • Author(s): N.Yasutake, K.Kotake, M.Hashimoto and S.Yamada
  • Journal Title: Physical Review D 75
  • Peer Reviewed
• [Journal Article] Reply to "Comments on 'Heavy element production in inhomogeneous big bang nucleosynthesis'" (2007)
  • Author(s): S. Matsuura, S. Fujimoto, M.Hashimoto and K.Sato
  • Journal Title: Physical Review D 75 Pages: 383-392
• [Journal Article] Reply to "Comments on Heavy element production in inhomogeneous big bang nucleosynthesis''' (2007)
  • Author(s): S. Matsuura, S. Fujimoto, M. Hashimoto, S. Yamada
  • Journal Title: Physical Review D 75 Pages: 1-5
  • Peer Reviewed
• [Journal Article] Heavy element uncleosynthesis in a Collapsar (2007)
  • Author(s): S.Fujimoto, M.Hashimoto, K.Kotake, S.Yamada
  • Journal Title: The Astrophysical Journal 656 Pages: 389-392
• [Journal Article] Effects of QCD phase transition on the gravitational from the magneto-rotational core collapse of massive stars (2007)
  • Author(s): N.Yasutake, K.Kotake, M.Hashimoto, S.Yamada
  • Journal Title: Physical Review D 75
• [Journal Article] R-Process Nucleosynthesis in MHD Jet Explosion of Core-Collapse Supernovae (2006)
  • Author(s): S. Nishimura, K. Kotake, M. Hashimoto, S. Yamada, N. Nishimura, K. Sato
  • Journal Title: The Astrophysical Journal 642 Pages: 410-419
  • Peer Reviewed
• [Journal Article] Magnetohydrodynamic Simulations of a rotating massive star collapsing to a black hole (2006)
  • Author(s): S. Fujimoto, K. Kotake, S. Yamada, M. Hashimoto, K. Sato
  • Journal Title: The Astrophysical Journal 656 Pages: 1040-1055
  • Peer Reviewed
• [Journal Article] AIP Conference Proceedings (2006)
  • Author(s): N. Nishimura, M. Hashimoto, S. Fujimoto, K. Kotake and S. Yamada
  • Journal Title: 847 Pages: 452-454
  • Peer Reviewed
• [Journal Article] R-Process Nucleosynthesis in MHD Jet Explosion of Core-Collapse Supernovae (2006)
  • Author(s): S.Nishimura, K.kotake, M.Hashimoto, S.Yamada, N.Nishimura, K.Sato
  • Journal Title: The Astrophysical Journal 642 Pages: 410-419
• [Journal Article] Magnctohydrodynamic Simulations of a rotationg massive star collapsing to a black hole (2006)
  • Author(s): S.Fujimoto, K.Kotate, S.Yamada, M.Hashimoto, K.Sato
  • Journal Title: The Astrophysical Journal 656 Pages: 1040-1055
• [Journal Article] Heavy Element Nucleosynthesis in the MHD Jet Explosions of Core-Collapse Supernovae (2006)
  • Author(s): N.Nishimura, M.Hashimoto, S.Fujimoto, K.Kotake, S.Yamada
  • Journal Title: AIP Conference Proceedings 847 Pages: 452-454
• [Journal Article] Exotic Cooling on Isolated Neutron Stars with Different Surface Compositions (2006)
  • Author(s): T.Noda, M.Hshimoto, M.Fujimoto, K.Arai
  • Journal Title: Physics Report of Kumamoto University 12 Pages: 227-232
• [Journal Article] Exotic Cooling on Isolated Neutron Stars with Different Surface Compositions
  • Author(s): T. Noda, M. Hashimoto, M. Fujimoto and K. Arai
  • Journal Title: Physics Report of Kumamoto University 12 Pages: 2006227-232
  • NAID: 110004848186
• [Presentation] コラプサーモデルによる大質量星の磁気駆動ジェット状爆発と爆発的元素合成 (2009)
  • Author(s): 小野勝臣, 橋本正章, 藤本信一郎, 固武慶, 山田章一
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-24
• [Presentation] 大質量星の進化における重元素合成 (2008)
  • Author(s): 小野勝臣、橋本正章、藤本信一郎、固武慶、山田章一
  • Organizer: 日本物理学会
  • Place of Presentation: 近畿大学本部キャンパス
  • Year and Date: 2008-03-24
• [Presentation] Collapsar modelにおける初期の磁場と回転がジェットに与える影響 (2008)
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
  • Year and Date: 2008-03-24
• [Presentation] 大質量星の進化における重元素合成 : weak s-processによる生成物 (2008)
  • Author(s): 西村信哉、橋本正章、藤本信一郎
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学
• [Presentation] 超新星爆発とニュートリノ (2007)
  • Author(s): 猿渡元彬、橋本正章、固武慶, 山田章一
  • Organizer: 日本物理学会九州支部例会
  • Place of Presentation: 大分大学
  • Year and Date: 2007-12-01
• [Presentation] 大質量星の進化における重元素合成 (2007)
  • Author(s): 西村信哉、橋本正章、藤本信一郎
  • Organizer: 日本物理学会九州支部例会
  • Place of Presentation: 大分大学
  • Year and Date: 2007-12-01