A systematic approach to predict neutrino signals from core-collpase supernovae

• Project Area: Revealing the history of the universe with underground particle and nuclear research
• Project/Area Number: 17H05206
• 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: National Astronomical Observatory of Japan
• Principal Investigator: 滝脇 知也 国立天文台, 理論研究部, 助教 (50507837)
• Project Period (FY): 2017-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: ニュートリノ / 超新星爆発 / 親星 / ニュートリノ振動

Outline of Annual Research Achievements

本研究では超新星爆発からの反電子ニュートリノの観測予言を行うことを目的とし、特に集団的ニュートリノ振動の効果に着目してスタートした。これまでの研究と違った大規模な(星の質量や金属量に対する)パラメータサーベイを予定していたが、研究を進めるうち、多くのパラメータでは、集団的ニュートリノ振動の効果が抑えられることが分かったため、むしろそれが起こらない、極端に密度が軽い星における研究に方向修正した。SK, KamLAND, XMASS 等の観測機器を駆使して、シグナルの特徴を引き出す特色についてはこれまでと変わらず、むしろ建設予定のDUNEによる電子ニュートリノの観測を期待した予言も追加した。
当該年度の研究の手順を説明する。まず、電子崩壊型超新星爆発のシミュレーションを1次元球対称の近似で行った。その時、ニュートリノの輻射輸送については等方拡散近似を使用したが、反応率についてはBruennの標準セットを超えたものを用いた。その後、ニュートリノの散乱角をシングルアングルで近似する手法でニュートリノ振動計算を行った。
研究の結果、これまでに報告のないニュートリノ振動のパターンが現れた。また、ニュートリノ振動の様子はニュートンのスペクトルに現れ、特に高エネルギーニュートリノの観測数と低エネルギーニュートリノの観測数の比に振動の特徴がクリアに現れることが分かった。これらについて論じた論文は投稿準備中である。

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Global comparison of core-collapse supernova simulations in spherical symmetry (2018)
  • Author(s): O’Connor Evan、Bollig Robert、Burrows Adam、Couch Sean、Fischer Tobias、Janka Hans-Thomas、Kotake Kei、Lentz Eric J、Liebend?rfer Matthias、Messer O E Bronson、Mezzacappa Anthony、Takiwaki Tomoya、Vartanyan David
  • Journal Title: Journal of Physics G: Nuclear and Particle Physics Volume: 45 Issue: 10 Pages: 104001-104001
  • DOI: 10.1088/1361-6471/aadeae
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Circular polarization of gravitational waves from non-rotating supernova cores: a new probe into the pre-explosion hydrodynamics (2018)
  • Author(s): Hayama Kazuhiro、Kuroda Takami、Kotake Kei、Takiwaki Tomoya
  • Journal Title: Monthly Notices of the Royal Astronomical Society: Letters Volume: 477 Issue: 1 Pages: L96-L100
  • DOI: 10.1093/mnrasl/sly055
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A full general relativistic neutrino radiation-hydrodynamics simulation of a collapsing very massive star and the formation of a black hole (2018)
  • Author(s): Kuroda Takami、Kotake Kei、Takiwaki Tomoya、Thielemann Friedrich-Karl
  • Journal Title: Monthly Notices of the Royal Astronomical Society: Letters Volume: 477 Issue: 1 Pages: L80-L84
  • DOI: 10.1093/mnrasl/sly059
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Chiral magnetohydrodynamic turbulence in core-collapse supernovae (2018)
  • Author(s): Masada Youhei、Kotake Kei、Takiwaki Tomoya、Yamamoto Naoki
  • Journal Title: Physical Review D Volume: 98 Issue: 8 Pages: 083018-083018
  • DOI: 10.1103/physrevd.98.083018
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Progenitor Mass Distribution of Core-collapse Supernova Remnants in Our Galaxy and Magellanic Clouds Based on Elemental Abundances (2018)
  • Author(s): Katsuda Satoru、Takiwaki Tomoya、Tominaga Nozomu、Moriya Takashi J.、Nakamura Ko
  • Journal Title: The Astrophysical Journal Volume: 863 Issue: 2 Pages: 127-127
  • DOI: 10.3847/1538-4357/aad2d8
  • Peer Reviewed / Open Access
• [Journal Article] A Linear and Quadratic Time-Frequency Analysis of Gravitational Waves from Core-Collapse Supernovae (2018)
  • Author(s): Hajime Kawahara, Takami Kuroda, Tomoya Takiwaki, Kazuhiro Hayama, Kei Kotake
  • Journal Title: The Astrophysical Journal Volume: 867 Issue: 2 Pages: 126-126
  • DOI: 10.3847/1538-4357/aae57b
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Impact of Neutrino Opacities on Core-collapse Supernova Simulations (2018)
  • Author(s): Kotake Kei , Takiwaki Tomoya , Fischer Tobias , Nakamura Ko , Martinez-Pinedo Gabriel
  • Journal Title: The Astrophysical Journal Volume: 853 Issue: 2 Pages: 170-170
  • DOI: 10.3847/1538-4357/aaa716
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Anisotropic emission of neutrino and gravitational-wave signals from rapidly rotating core-collapse supernovae (2018)
  • Author(s): Takiwaki Tomoya , Kotake Kei
  • Journal Title: Monthly Notices of the Royal Astronomical Society: Letters Volume: 475 Issue: 1 Pages: L91-L95
  • DOI: 10.1093/mnrasl/sly008
  • Peer Reviewed
• [Journal Article] Possible effects of collective neutrino oscillations in three-flavor multiangle simulations of supernova ν p processes (2017)
  • Author(s): Sasaki, H.; Kajino, T.; Takiwaki, T.; Hayakawa, T.; Balantekin, A. B.; Pehlivan, Y.
  • Journal Title: Physical Review D Volume: 96 Issue: 4 Pages: 043013-043013
  • DOI: 10.1103/physrevd.96.043013
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Probing mass-radius relation of protoneutron stars from gravitational-wave asteroseismology (2017)
  • Author(s): Sotani Hajime、Kuroda Takami、Takiwaki Tomoya、Kotake Kei
  • Journal Title: Physical Review D Volume: 96 Issue: 6 Pages: 1-10
  • DOI: 10.1103/physrevd.96.063005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Estimating the core compactness of massive stars with Galactic supernova neutrinos (2017)
  • Author(s): Horiuchi Shunsaku , Nakamura Ko , Takiwaki Tomoya , Kotake Kei
  • Journal Title: Journal of Physics G: Nuclear and Particle Physics Volume: 44 Issue: 11 Pages: 114001-114001
  • DOI: 10.1088/1361-6471/aa8f1f
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Correlated Signatures of Gravitational-wave and Neutrino Emission in Three-dimensional General-relativistic Core-collapse Supernova Simulations (2017)
  • Author(s): Kuroda Takami , Kotake Kei , Hayama Kazuhiro , Takiwaki Tomoya
  • Journal Title: The Astrophysical Journal Volume: 851 Issue: 1 Pages: 62-62
  • DOI: 10.3847/1538-4357/aa988d
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Diffuse supernova neutrino background from extensive core-collapse simulations of 8?100?M? progenitors (2017)
  • Author(s): Horiuchi Shunsaku、Sumiyoshi Kohsuke、Nakamura Ko、Fischer Tobias、Summa Alexander、Takiwaki Tomoya、Janka Hans-Thomas、Kotake Kei
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 475 Issue: 1 Pages: 1363-1374
  • DOI: 10.1093/mnras/stx3271
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Status of the supernova simulations with 3DnSNe-IDSA: Impact of EoS and Rotation (2019)
  • Author(s): Tomoya Takiwaki
  • Organizer: XIXth Workshop on Nuclear Astrophysics
  • Int'l Joint Research / Invited
• [Presentation] Signature of Collective Neutrino Oscillation in 8.8M_s star (2019)
  • Author(s): Tomoya Takiwaki
  • Organizer: Revealing the history of the universe with underground particle and nuclear research 2019
  • Int'l Joint Research / Invited
• [Presentation] Neutrino Radiation Hydrodynamic Simulation of an Ultra-stripped Type Ic Supernova (2019)
  • Author(s): Tomoya Takiwaki
  • Organizer: 10th DTA symposium Stellar deaths and their diversity
  • Int'l Joint Research / Invited
• [Presentation] 超新星爆発の長時間計算と元素合成に向けて (2019)
  • Author(s): 滝脇知也
  • Organizer: 「京からポスト京に向けて」シンポジウム
  • Invited
• [Presentation] ニュートリノ振動を考慮した.ニュートリノスペクトルの系統的研究 (2019)
  • Author(s): 滝脇知也
  • Organizer: 新学術地下素核研究会
• [Presentation] Chiral Magnetic Effect in Proto-Neutron Stars (2018)
  • Author(s): 滝脇知也
  • Organizer: Spintronics: from electrons to quarks
• [Presentation] Recent Status of Core-collapse supernova Simulations from viewpoint of the microphysics (2018)
  • Author(s): Tomoya Takiwaki
  • Organizer: APS symposium Hawaii2018
  • Int'l Joint Research / Invited
• [Presentation] Supernova dynamics uncovered by three dimensional simulations (2018)
  • Author(s): Tomoya Takiwaki
  • Organizer: SNeGWv2018
  • Int'l Joint Research / Invited
• [Presentation] Three-dimensional simulations of rapidly rotating core-collapse supernovae (2018)
  • Author(s): Tomoya Takiwaki
  • Organizer: IWARA2018
  • Int'l Joint Research / Invited
• [Presentation] 行き先は中性子星ー超新星の爆発機構と天体核物理への招待 (2018)
  • Author(s): 滝脇知也
  • Organizer: 2018年度 第48回 天文・天体物理若手夏の学校
• [Presentation] Mechanism of Core-Collapse Supernovae and Expected Neutrino and Gravitational Wave Signals (2018)
  • Author(s): Tomoya Takiwaki
  • Organizer: 2018 KPS spring meeting
  • Int'l Joint Research / Invited
• [Presentation] C01 progress report (2018)
  • Author(s): Tomoya Takiwaki
  • Organizer: The first annual symposium of the innovative area "Gravitational Wave Physics and Astronomy: Genesis"
  • Invited
• [Presentation] ニュートリノ振動を考慮したニュートリノスペクトルの系統的研究 (2018)
  • Author(s): 滝脇知也
  • Organizer: 新学術領域地下素核C01
  • Invited
• [Presentation] Rotation aided neutrino driven explosion (2017)
  • Author(s): Tomoya Takiwaki
  • Organizer: Workshop on The Progenitor-Supernova-Remnant Connection
• [Presentation] Supernovae Wars: Results of Comparison Project (2017)
  • Author(s): Tomoya Takiwaki
  • Organizer: DTA workshop
• [Presentation] 超新星爆発の長時間計算，その前に (2017)
  • Author(s): 滝脇知也
  • Organizer: 素粒子・原子核・宇宙「京からポスト京に向けて」シンポジウム
  • Invited
• [Presentation] Oblate Supernova Explosions Aided by Rotation (2017)
  • Author(s): Tomoya Takiwaki
  • Organizer: Deciphering the violent universe
• [Presentation] Three dimensional simulations of rapidly rotating core-collapse supernovae (2017)
  • Author(s): Tomoya Takiwaki
  • Organizer: Southern Horizons in Time-Domain Astronomy