Construction of a magneto-hydrodynamical model of hypernovaeand GRBs, and the abundance of extremely metal-poor stars

• Project/Area Number: 19840010
• Research Category: Grant-in-Aid for Young Scientists (Start-up)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: The University of Tokyo
• Principal Investigator: UMEDA Hideyuki The University of Tokyo, 大学院・理学系研究科, 准教授 (60447357)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,125,000 (Direct Cost: ¥2,720,000、Indirect Cost: ¥405,000); Fiscal Year 2008: ¥1,755,000 (Direct Cost: ¥1,350,000、Indirect Cost: ¥405,000); Fiscal Year 2007: ¥1,370,000 (Direct Cost: ¥1,370,000)
• Keywords: 理論天文学 / ガンマ線バースト / 超新星 / 極超新星 / 磁気流体 / 金属欠乏星 / 爆発シミュレーション / 超新星の爆発機構 / 金属欠乏星の組成 / 第一世代星

Research Abstract

主目的であった多次元磁気流体計算コードの独自開発に成功した。コードはメッシュの自動細分化と並列計算へ対応しており、大型計算機を用いた高精度の多次元計算が可能となった。他のグループのコードと異なり数値粘性を導入せずに衝撃波が解けるローの方法を採用し、超新星やガンマ線バーストの爆発機構解明のための独立な結果を提供出来るようになった。また、超新星深部の元素合成の計算を行い金属欠乏星の組成と比較することにより、爆発機構と密接に関連する弱r-過程元素の合成条件を明らかにした。

Research Products

• [Journal Article] Explosive Nucleosynthesis of WeakR-Process Elements in ExtremelyMetal-Poor Core-Collapse Supernovae (2009)
  • Author(s): Izutani, N., Umeda, H., Tominaga, N
  • Journal Title: The Astrophysical Journal 692 Pages: 1517-1531
  • Peer Reviewed
• [Journal Article] Properties of Newly Formed Dust bySN2006jc Based on Near-toMid-Infrared Observation with AKARI (2009)
  • Author(s): Sakon, I., 他, Umeda, H.
  • Journal Title: The Astrophysical Journal 692 Pages: 546-555
  • Peer Reviewed
• [Journal Article] Thermal Evolution of Hyperon-MixedNeutron Stars, The Astrophysical (2009)
  • Author(s): Tsuruta, S., 他, Umeda, H.
  • Journal Title: Journal 691 Pages: 621-632
  • Peer Reviewed
• [Journal Article] Injection of Short-LivedRadionuclides into the Early SolarSystem from a Faint Supernova withMixing Fallback (2009)
  • Author(s): Takigawa, A., 他, Umeda, H.
  • Journal Title: The AstrophysicalJournal 691 Pages: 1382-1387
  • Peer Reviewed
• [Journal Article] Empirical Abundance ScalingLaws and Implications for the GammaProcess in Core-Collapse Supernovae (2009)
  • Author(s): Hayakawa, T., 他5 名, Umeda, H.
  • Journal Title: The Astrophysical Journal 688 Pages: 1382-1387
  • Peer Reviewed
• [Journal Article] Injection of Short-Lived Radionuclides into the Early Solar System from a Faint Supernova with Mixing Fallback (2009)
  • Author(s): Takigawa, A.
  • Journal Title: The Astrophysical Journal 688 Pages: 1382-1387
  • Peer Reviewed
• [Journal Article] Thermal Evolution of Hyperon-Mixed Neutron Stars (2009)
  • Author(s): Tsuruta, S.
  • Journal Title: The Astrophysical Journal 691 Pages: 621-632
  • Peer Reviewed
• [Journal Article] Properties of Newly Formed Dust by SN 2006JC Based on Near- to Mid-Infraed Observation With AKARI (2009)
  • Author(s): Sakon, I.
  • Journal Title: The Astrophysical Journal 692 Pages: 546-555
  • Peer Reviewed
• [Journal Article] Explosive Nucleosynthesis of Weak R-Process Elements in Extremely Metal-Poor Core-Collapse Supernovae (2009)
  • Author(s): Izutani, N.
  • Journal Title: The Astrophysical Journal 692 Pages: 1517-1531
  • Peer Reviewed
• [Journal Article] Early Formation of Dust in theEjecta of Type Ib SN2006jc andTemperature and Mass of the Dust (2008)
  • Author(s): Nozawa, T., 他, Umeda, H.
  • Journal Title: The Astrophysical Journal 684 Pages: 1343-1350
  • Peer Reviewed
• [Journal Article] Chemical Abundances of the Secondary Star inthe Black Hole X-ray Binary XTE (2008)
  • Author(s): Hernandez, J. I. G., 他, Umeda, H.
  • Journal Title: The Astrophysical Journal 679 Pages: 732-745
  • Peer Reviewed
• [Journal Article] How much 56Ni can be Produced inCore-Collapse Supernovae- Evolutionand Explosion of 30-100Msolar Stars (2008)
  • Author(s): Umeda,H., Nomoto,K
  • Journal Title: The Astrophysical Journal 673 Pages: 1014-1022
  • Peer Reviewed
• [Journal Article] ν-Process Nucleosynthesis inPopulation III Core-ollapse Supernovae (2008)
  • Author(s): Yoshida,T., Umeda,H., Nomoto,K.
  • Journal Title: The AstrophysicalJournal 672 Pages: 1043-1053
  • Peer Reviewed
• [Journal Article] ν-Process Nucleosynthesis in Population III Core-COllapse Supernovae (2008)
  • Author(s): Yoshida, T.
  • Journal Title: The Astrophysical Journal 672 Pages: 1043-1053
  • Peer Reviewed
• [Journal Article] How Much Ni^^<56> Can Be Produced in Core-Collapse Supernovae? Evolution and Explosions of 30-100 M__<solar>Stars (2008)
  • Author(s): Umeda, H.
  • Journal Title: The Astrophysical Journal 673 Pages: 1014-1022
  • Peer Reviewed
• [Journal Article] Chemical Abundances of the Secondary Star in the Black Hole X-Ray Binary XTE Jll18+480 (2008)
  • Author(s): Hernandez, J.
  • Journal Title: The Astrophysical Journal 679 Pages: 732-745
  • Peer Reviewed
• [Journal Article] Early Formation of Dust in the Ejecta of Type lb SN 2006jc and Temperature and Mass of the Dust (2008)
  • Author(s): Nozawa, T.
  • Journal Title: The Astrophysical Journal 684 Pages: 1343-1350
  • Peer Reviewed
• [Journal Article] Empirical Abundance Scaling Laws and Implications for the Gamm a Process in Core-Collapse Supernovae (2008)
  • Author(s): Hayakawa, T.
  • Journal Title: The Astrophysical Journal 685 Pages: 1089-1102
  • Peer Reviewed
• [Journal Article] How Much 56Ni Can Be Produced in Core-Collapse Supernovae? Evolution and Explosions of 30-100 Msolar Stars (2008)
  • Author(s): Umeda, H.; Nomoto, K.
  • Journal Title: The Astrophysical Journal 673 Pages: 1014-1022
  • Peer Reviewed
• [Journal Article] v-Process Nucleosynthesis in Population III Core-Collapse Supernovae (2008)
  • Author(s): Yoshida, T.; Umeda, H.; Nomoto, K.
  • Journal Title: The Astrophysical Journal 672 Pages: 1043-1053
  • Peer Reviewed
• [Journal Article] Supernova Nucleosynthesis inPopulation III 13-50 Msolar Stars and Abundance patterns of ExtremelyMetal-Poor Stars (2007)
  • Author(s): Tominaga,N., Umeda,H., Nomoto,K.
  • Journal Title: The Astrophysical Journal 660 Pages: 516-540
  • Peer Reviewed
• [Journal Article] Supernova Nucleosynthesis in Population III 13-50 Msolar Stars and Abundance Patterns of Extremely Metal-poor Stars (2007)
  • Author(s): Tominaga, N.; Umeda, H.; Nomoto, K.
  • Journal Title: The Astrophysical Journal 660 Pages: 516-540
  • Peer Reviewed
• [Presentation] z-50でできる宇宙で最初の星の進化と巨大ブラックホール形成II(ダークマター対消滅の効果) (2009)
  • Author(s): 梅田秀之
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-26
• [Presentation] z-50でできる宇宙で最初の星の進化と巨大ブラックホール形成I (2009)
  • Author(s): 泉谷夏子
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-26
• [Presentation] 質量降着を伴う種族IIIの巨大質量星の進化とブラックホールの形成 (2009)
  • Author(s): 大久保琢也
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-26
• [Presentation] 質量降着を伴う種族IIIの巨大質量星の進化とブラックホールの形成 (2009)
  • Author(s): 大久保琢也
  • Organizer: 日本天文学会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2009-03-26
• [Presentation] z〜50でできる宇宙で最初の星の進化と巨大ブラックホール形成I (2009)
  • Author(s): 泉谷夏子
  • Organizer: 日本天文学会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2009-03-26
• [Presentation] z〜50でできる宇宙で最初の星の進化と巨大ブラックホール形成II(ダークマター対消滅の効果) (2009)
  • Author(s): 梅田秀之
  • Organizer: 日本天文学会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2009-03-26
• [Presentation] 軽い中性子捕獲(Weak r)元素をつくる超新星モデル(II) : Ga-Rh について (2008)
  • Author(s): 泉谷夏子
  • Organizer: 日本天文学会2008年秋季年会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2008-09-13
• [Presentation] 軽い中性子捕獲(weak r)元素をつくる超新星モデル(II):Ga-Rhについて (2008)
  • Author(s): 泉谷夏子
  • Organizer: 日本天文学会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2008-09-13
• [Presentation] 重力崩壊型超新星爆発の多次元磁気流体シミュレーション (2007)
  • Author(s): 黒田仰生
  • Organizer: 日本天文学会2007年秋季年会
  • Place of Presentation: 岐阜大学
  • Year and Date: 2007-09-26
• [Presentation] 重力崩壊型超新星が放出する56Niの最大量とSN2006gyの正体 (2007)
  • Author(s): 梅田秀之
  • Organizer: 日本天文学会2007年秋季年会
  • Place of Presentation: 岐阜大学
  • Year and Date: 2007-09-26