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2009 Fiscal Year Annual Research Report

クォーク力学・原子核構造に基づく爆発的天体現象と元素合成

Planned Research

Project AreaResearch on the Emergence of Hierarchical Structure of Matter by Bridging Particle, Nuclear and Astrophysics in Computational Science
Project/Area Number 20105004
Research InstitutionTokyo University of Science

Principal Investigator

鈴木 英之  Tokyo University of Science, 理工学部, 教授 (90211987)

Co-Investigator(Kenkyū-buntansha) 柴田 大  京都大学, 基礎物理学研究所, 教授 (80252576)
梅田 秀之  東京大学, 大学院・理学系研究科, 准教授 (60447357)
梶野 敏貴  国立天文台, 理論研究部, 准教授 (20169444)
住吉 光介  沼津工業高等専門学校, 教養科, 准教授 (30280720)
Keywords超新星爆発 / ニュートリノ / 状態方程式 / ブラックホール / 中性子星 / 重力波 / 元素合成 / ニュートリノ振動
Research Abstract

21年度は昨年度末の研究集会で議論した研究テーマについて研究を進めた。柴田を中心に、既存の数値相対論コードに現実的状態方程式およびニュートリノ放射の寄与を組み込む作業と計算の精密化・高速化を行い、連星中性子星の合体に対してインスパイラルから合体に至るまで安定に正しく計算可能であることを確認した。一方球対称重力崩壊のシミュレーションについては、住吉を中心としてブラックホール形成のダイナミクスとニュートリノ放出シグナルの予測を行なった。特に、核物質・ハイペロン・クォークの状態方程式を用いて、中心部の高温高密度物質の違いによる影響について系統的に調べ、ニュートリノ観測でハイペロンの出現を統計的に区別できるかどうかを明らかにした。さらに、梅田との連携を視野に大質量星のモデル(質量・金属量)依存性を系統的に調べるため、予備的なシミュレーションを行なった。多次元ニュートリノ輻射輸送計算コードの基礎部分を開発してテスト計算を行い、A04班(松古)と連携して、将来の計算規模や行列パターンの予測を行なった。核物質の状態方程式の研究を進めたほか、軽元素が出現する場合にニュートリノ重陽子反応が加熱率に及ぼす影響について明らかにした。鈴木は久野と共同で超新星近傍での自己相互作用を考慮したニュートリノ振動によるエネルギースペクトルの変化を系統的に調べた。梅田は吉田とともに、大質量星の進化計算コードに自転の効果を組み込む作業を進め、大質量星の質量放出物質の化学組成を系統的に調べた。また、宇宙の最初の星の成長、進化に対する暗黒物質対消滅の影響を明らかにした。梶野は中村とともに、Ic型の超新星爆発におけるニュートリノ反応入り元素合成ネットワークを計算し、軽元素の生成量を明らかにした。

  • Research Products

    (41 results)

All 2010 2009 Other

All Journal Article (21 results) (of which Peer Reviewed: 21 results) Presentation (19 results) Remarks (1 results)

  • [Journal Article] New constraint on the Primordial Magnetic Field.2010

    • Author(s)
      Dai.G.Yamazaki, Kiyotomo Ichiki, Toshitaka Kajino, Grant J.Mathews
    • Journal Title

      Phys.Rev.D 81

      Pages: 023008:1-7

    • Peer Reviewed
  • [Journal Article] Generation of Curvature Perturbation with Extra Anisotropic Stress.2010

    • Author(s)
      Kazuhiko Kojima, Toshitaka Kajino, Grant J.Mathews
    • Journal Title

      JCAP 02

      Pages: 018

    • Peer Reviewed
  • [Journal Article] Neutrino reactions on 12C by the quasiparticle random-phase approximation.2010

    • Author(s)
      M.K.Cheoun, E.Ha, S.Y.Lee, K.S.Kim, W.Y.So, T.Kajino
    • Journal Title

      Phys.Rev.C 81

      Pages: 028501:1-4

    • Peer Reviewed
  • [Journal Article] Neutrino reactions via neutral and charged current by quasi-particle random phase approximation(QRPA).2010

    • Author(s)
      M.K.Cheoun, E.Ha, K.S.Kim, T.Kajino
    • Journal Title

      J.Phys.G 37

      Pages: 055101

    • Peer Reviewed
  • [Journal Article] EOS of hyperonic matter fbr core-collapse supernovae2010

    • Author(s)
      A.Ohnishi, K.Tsubakihara, K.Sumiyoshi, C.Ishizuka, S.Yamada, H.Suzuki
    • Journal Title

      Nuclear Physics A 835

      Pages: 374-377

    • Peer Reviewed
  • [Journal Article] Emergence of hyperons in failed supernovae with short neutrino bursts2010

    • Author(s)
      K.Sumiyoshi, K.Nakazato, C.Ishizuka, A.Ohnishi, S.Yamada, H.Suzuki
    • Journal Title

      Nuclear Physics A 835

      Pages: 295-302

    • Peer Reviewed
  • [Journal Article] Non-uniform matter in neutron star crusts studied by the variational method with Thomas-Fermi calculations2009

    • Author(s)
      H.Kanzawa, M.Takano, K.Oyamatsu, K.Sumiyoshi
    • Journal Title

      Progress of Theoretical Physics 122

      Pages: 673-691

    • Peer Reviewed
  • [Journal Article] Neutrino deuteron reaction in the heating mechanism of core-collapse supernovae2009

    • Author(s)
      S.Nakamura, K.Sumiyoshi, T.Sato
    • Journal Title

      Physical Review C 80

      Pages: 035802-1-6

    • Peer Reviewed
  • [Journal Article] Longterm general relativistic simulation of binary neutron stars collapsing to a black hole2009

    • Author(s)
      K.Kiuchi, Y.I.Sekiguchi, M.Shibata, K.Tanigucghi
    • Journal Title

      Physical Review D 80

      Pages: 064037-1-27

    • Peer Reviewed
  • [Journal Article] Non-conformally flat initial data for binary compact objects2009

    • Author(s)
      K.Uryu, et al
    • Journal Title

      Physical Review D 80

      Pages: 124004-1-23

    • Peer Reviewed
  • [Journal Article] Evolution of Very Massive Population III Stars with Mass Accretion from Pre-main Sequence to Collapse2009

    • Author(s)
      Ohkubo, Takuya
    • Journal Title

      The Astrophysical Journal 706

      Pages: 1184-1193

    • Peer Reviewed
  • [Journal Article] Early Black Hole formation by accretion of gas and dark matter2009

    • Author(s)
      Umeda, Hideyuki
    • Journal Title

      Journal of Cosmology and Astroparticle Physict 08

    • Peer Reviewed
  • [Journal Article] A new measurement of the astrophysical Li8(d,t)Li7 reaction.2009

    • Author(s)
      T.Hashimoto, et al.
    • Journal Title

      Phys.Lett.B 674

      Pages: 276-280

    • Peer Reviewed
  • [Journal Article] Reply to "Comment on La138-Ce138-Ce136 nuclear cosmochronometer of supernova neutrino process".2009

    • Author(s)
      T.Hayakawa, T.Shizuma, T.Kajino, K.Ogawa, H.Nakada
    • Journal Title

      Phys.Rev.C 79

      Pages: 059802:1-2

    • Peer Reviewed
  • [Journal Article] The interstellar rubidium isotope ratio toward HD 1694542009

    • Author(s)
      Satoshi Kawanomoto, Wako Aoki, Toshitaka Kajino, Grant J.Mathews
    • Journal Title

      Astrophys.J. 698

      Pages: 509-513

    • Peer Reviewed
  • [Journal Article] Neutrino-Induced Reactions on Fe56 and Ni56 and Production of Mn55 in Population III Stars2009

    • Author(s)
      T.Suzuki, M.Honma, K.Higas hiyama, T.Yoshida, T.Kajino, T.Otsuka, H.Umeda, K.Nomoto
    • Journal Title

      Phys.Rev.C 79

      Pages: 061603(R):1-4

    • Peer Reviewed
  • [Journal Article] New Constraints on Radiative Decay of Long-Lived X Particles in Big Bang Nucleosynthesis with New Rates of Photodisintegration Reactions of He4.2009

    • Author(s)
      Motohiko Kusakabe, Toshitaka Kajino, Takashi Yoshida, Tatsushi Shima, Yasuki Nagai, Toshiteru Kii
    • Journal Title

      Phys.Rev.D 79

      Pages: 123513:1-10

    • Peer Reviewed
  • [Journal Article] First Observation of Li7/Li6 Isotopic Ratio in the Interstellar Media beyond the Solar Neighborhood.2009

    • Author(s)
      S.Kawanomoto, T.K.Suzuki, T.Kajino, H.Ando, M.Bessell, K.Noguchi, W.Aoki, S.Honda, H.Izumiura, E.Kambe, K.Okita, K.Sadakane, B.Sato, A.Tajitsu, M.Takada-Hidai, W.Tanakal, E.Watanabe, M.Yoshida
    • Journal Title

      Astrophys.J. 701

      Pages: 1506-1518

    • Peer Reviewed
  • [Journal Article] Effect of Long-lived Strongly Interacting Relic Particles on Big-Bang Nucleosynthesis2009

    • Author(s)
      Motohiko Kusakabe, Toshitaka Kajino, Takashi Yoshida, Grant J.Mathews
    • Journal Title

      Phys.Rev.D 80

      Pages: 103501:1-17

    • Peer Reviewed
  • [Journal Article] Neutron capture cross-section to Cd113 isomer and s-process contribution to rare p-nuclide Sn115.2009

    • Author(s)
      T.Hayakawa, T.Shizuma, S.Chiba, T.Kajino, Y.Hatsukawa, N.Iwamoto, N.Shinohara, H.Harada
    • Journal Title

      Astrophys.J. 707

      Pages: 859-865

    • Peer Reviewed
  • [Journal Article] Resonant Spin-Flavor Conversion of Supernova Neutrinos : Dependence on Electron Mole Fraction.2009

    • Author(s)
      Takashi Yoshida, Akira Takamura, Kei-ichi Kimura, Hidekazu Yokomakura, Shio Kawagoe, Toshitaka Kajino
    • Journal Title

      Phys.Rev.D 80

      Pages: 125032:1-16

    • Peer Reviewed
  • [Presentation] Observational constraints on brane world cosmology, SUSY-particle catalized Big-Bang Nucleosynthesis and DM, Effects of primordial magnetic field and neutrino on CMB, Supernova nucleosynthesis and neutrino oscillation(招待講演)2010

    • Author(s)
      T.Kajino
    • Organizer
      The First APCosPA(Asia Pacific Center forCosmology and Particle Astrophysics) Winter School on Cosmology and Particle Astrophysics
    • Place of Presentation
      National Taiwan University, Taipei in Taiwan
    • Year and Date
      20100118-20100129
  • [Presentation] 3次元磁気流体計算による15太陽質量星の重力崩壊2010

    • Author(s)
      黒田仰生
    • Organizer
      日本天文学会2010年春季年会
    • Place of Presentation
      広島大学
    • Year and Date
      2010-03-24
  • [Presentation] 大質量星の進化における質量放出とその化学組成2010

    • Author(s)
      吉田敬
    • Organizer
      日本天文学会2010年春季年会
    • Place of Presentation
      広島大学
    • Year and Date
      2010-03-24
  • [Presentation] 超新星における高温高密度物質とニュートリノ2010

    • Author(s)
      住吉光介
    • Organizer
      日本物理学会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-22
  • [Presentation] 超新星ニュートリノの集団振動とエネルギースペクトル2010

    • Author(s)
      久野昌哉
    • Organizer
      日本物理学会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-22
  • [Presentation] 重力崩壊型超新星爆発とブラックホール形成時に放出されるニュートリノ(招待講演)2010

    • Author(s)
      鈴木英之
    • Organizer
      素粒子原子核研究所コロキウム
    • Place of Presentation
      素粒子原子核研究所
    • Year and Date
      2010-03-12
  • [Presentation] 3次元ニュートリノ輻射輸送計算へ向けて2010

    • Author(s)
      住吉光介
    • Organizer
      研究会「超新星の爆発機構とガンマ線バースト源エンジンの統一的解明」
    • Place of Presentation
      国立天文台
    • Year and Date
      2010-01-06
  • [Presentation] 超新星ニュートリノの集団振動とエネルギースペクトル2010

    • Author(s)
      久野昌哉
    • Organizer
      研究会「超新星の爆発機構とガンマ線バースト源エンジンの統一的解明」
    • Place of Presentation
      国立天文台
    • Year and Date
      2010-01-06
  • [Presentation] Nucleosynthetic Signature of Supernovae and Collapsars(Gamma Ray Bursts)(招待講演)2009

    • Author(s)
      T.Kajino
    • Organizer
      JUSTIPEN-EFES Workshop on Unstable Nuclei
    • Place of Presentation
      RIKEN Nishina Hall, Wako in Japan
    • Year and Date
      20091207-20091209
  • [Presentation] R-process in Supernovae and Gamma-Ray Bursts(招待講演)2009

    • Author(s)
      T.Kajino
    • Organizer
      7th Japan-China Joint Nuclear Physics Symposium
    • Place of Presentation
      University of Tsukuba, Tsukuba in Japan
    • Year and Date
      20091109-20091113
  • [Presentation] Neutrinos in Nuclear Physics and Astrophysics and US-Japan Collaboration(招待講演)2009

    • Author(s)
      T.Kajino
    • Organizer
      Workshop on "Physics of Exotic Nuclei" in 3rd Joint Meeting of the Nuclear Physics Divisions of APS and JPS
    • Place of Presentation
      Waikoloa, Hawaii in U.S.A
    • Year and Date
      20091013-20091017
  • [Presentation] The Big-Bang Cosmology and Nucleosynthesis(招待講演)2009

    • Author(s)
      T.Kajino
    • Organizer
      5th European Summer School on Nuclear Astroph ysics
    • Place of Presentation
      Santa Tecla, Sicily in Italy
    • Year and Date
      20090921-20090927
  • [Presentation] An Alternative to Inflation? : Critical Role of Neutrino Anisotropic Stress in CMB(招待講演)2009

    • Author(s)
      T.Kajino
    • Organizer
      Erice INternational School of Nuclear Physics 31st Course on "Neutrinos in Cosmology, in Astro-, Particle- and Nuclear-Physics"
    • Place of Presentation
      Erice, Sicily in Italy
    • Year and Date
      20090916-20090920
  • [Presentation] Nuclear Astrophysics in Japan : Understanding the Universe with the Origin and Evolution of Elements(招待講演)2009

    • Author(s)
      T.Kajino
    • Organizer
      Elizabeth and Frederick White Conference on Nuclear Astrophysics in Australia
    • Place of Presentation
      Australian Academy of Science, Canberra, Australia
    • Year and Date
      20090824-20090826
  • [Presentation] Merger of binary neutron stars and black hole-neutron star binaries(招待講演)2009

    • Author(s)
      M.Shibata
    • Organizer
      Computational relativistic astrophysics
    • Place of Presentation
      USA, Princeton
    • Year and Date
      2009-10-23
  • [Presentation] Emergence of hyperons in failed supernovae with short neutrino bursts(招待講演)2009

    • Author(s)
      K.Sumiyoshi, K.Nakazato, C.Ishizuka, A.Ohnishi, S.Yamada, H.Suzuki
    • Organizer
      The 10^<th> International Conference on Hypernuclear and Strange Particle Physics(Hyp X)
    • Place of Presentation
      RICOTTI in Tokai, Ibaraki, Japan
    • Year and Date
      2009-09-18
  • [Presentation] 超新星ニュートリノの集団振動によるエネルギースペクトルの変化2009

    • Author(s)
      久野昌哉
    • Organizer
      日本天文学会
    • Place of Presentation
      山口大学
    • Year and Date
      2009-09-14
  • [Presentation] Numerical simulation of binary merger in Japan(招待講演)2009

    • Author(s)
      M.Shibata
    • Organizer
      MICRA2009
    • Place of Presentation
      Denmark, Neils Bohr Institute
    • Year and Date
      2009-08-24
  • [Presentation] Fully general relativistic MHD simulation of binary neutron stars(招待講演)2009

    • Author(s)
      M.Shibata
    • Organizer
      ASTRONUM2009
    • Place of Presentation
      France, Chamonix
    • Year and Date
      2009-07-02
  • [Remarks]

    • URL

      http://bridge.kek.jp/

URL: 

Published: 2011-06-16   Modified: 2016-04-21  

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