Diverse Theoretical Studies toward Observations of the Supernova Neutrinos

• Project/Area Number: 26870615
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy; Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Kyushu University (2015-2016); Tokyo University of Science (2014)
• Principal Investigator: Nakazato Ken'ichiro 九州大学, 基幹教育院, 助教 (80609347)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: 超新星ニュートリノ / 超新星背景ニュートリノ / ブラックホール / 重力波

Outline of Final Research Achievements

Stars with masses more than 10 solar masses undergo the gravitational collapse and the subsequent supernova explosions and/or black-hole formations. Observational properties of the neutrinos emitted from these processes are investigated in this project. Firstly, for a neutrino burst from Galactic supernovae, time variations are evaluated for the event number, energy and angular distributions, and fraction of events with neutron tag. Secondly, for the supernova relic neutrinos, which are the integration of neutrino flux emitted by past supernovae, the flux and spectrum are evaluated taking into account various uncertainties. As a result, it is found that the low-energy spectrum of supernova relic neutrinos is mainly determined by the cosmic star formation rate density and a future experiment in Super-Kamiokande with gadolinium-loaded water is important for the detection of these low-energy neutrinos.

Research Products

• [Journal Article] Nuclear equation of state for core-collapse supernova simulations with realistic nuclear forces (2017)
  • Author(s): H. Togashi, K. Nakazato, Y. Takehara, S. Yamamuro, H. Suzuki, M. Takano
  • Journal Title: Nuclear Physics A Volume: 961 Pages: 78-105
  • DOI: 10.1016/j.nuclphysa.2017.02.010
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Detectability and Uncertainties of the Supernova Relic Neutrino Background (2017)
  • Author(s): Ken'ichiro Nakazato, Eri Mochida, Yuu Niino, Hideyuki Suzuki
  • Journal Title: JPS Conference Proceedings Volume: 14
  • DOI: 10.7566/jpscp.14.010705
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Gravitational-Wave Background from Binary Mergers and Metallicity Evolution of Galaxies (2016)
  • Author(s): Ken'ichiro Nakazato, Yuu Niino, Norichika Sago
  • Journal Title: The Astrophysical Journal Volume: 832 Issue: 2 Pages: 146-146
  • DOI: 10.3847/0004-637x/832/2/146
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spectrum of the Supernova Relic Neutrino Background and Metallicity Evolution of Galaxies (2015)
  • Author(s): Ken'ichiro Nakazato, Eri Mochida, Yuu Niino, and Hideyuki Suzuki
  • Journal Title: The Astrophysical Journal Volume: 804 Issue: 1 Pages: 75-89
  • DOI: 10.1088/0004-637x/804/1/75
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Supernova Explosion and Black Hole Formation with QCD Phase Transition (2015)
  • Author(s): Ken'ichiro Nakazato
  • Journal Title: Acta Astronomica Sinica Volume: 56 Supplement Pages: 49-51
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Self-organized criticality in a spherically closed cellular automaton: Modeling soft gamma repeater bursts driven by magnetic reconnection (2014)
  • Author(s): Ken'ichiro Nakazato
  • Journal Title: Phys. Rev. D Volume: 90 Issue: 4
  • DOI: 10.1103/physrevd.90.043010
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Supernova explosion and black hole formation with hadron-quark phase transition (2014)
  • Author(s): Ken'ichiro Nakazato
  • Journal Title: AIP Conf. Proc. Volume: 1594 Pages: 278-283
  • DOI: 10.1063/1.4874082
  • Open Access / Acknowledgement Compliant
• [Journal Article] Complete equation of state for neutron stars using the relativistic Hartree-Fock approximation (2014)
  • Author(s): Tsuyoshi Miyatsu, Sachiko Yamamuro, Ken'ichiro Nakazato, Myung-Ki Cheoun
  • Journal Title: AIP Conf. Proc. Volume: 1594 Pages: 420-425
  • DOI: 10.1063/1.4874104
  • Open Access / Acknowledgement Compliant
• [Journal Article] Equation of state for nuclear matter in core-collapse supernovae by the variational method (2014)
  • Author(s): H. Togashi, Y. Takehara, S. Yamamuro, K. Nakazato, H. Suzuki, K. Sumiyoshi and M. Takano
  • Journal Title: Journal of Physics: Conference Series Volume: 569 Pages: 012058-012058
  • DOI: 10.1088/1742-6596/569/1/012058
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 大質量星の重力崩壊によるブラックホールの形成とニュートリノ放出 (2017)
  • Author(s): 中里健一郎
  • Organizer: 新学術「地下素核研究」第３回超新星ニュートリノ研究会
  • Place of Presentation: 東北大学青葉山キャンパス（宮城県）
  • Year and Date: 2017-03-04
• [Presentation] Neutrino Observation of Core Collapse Supernovae (2017)
  • Author(s): Ken'ichiro Nakazato
  • Organizer: Quarks and Compact Stars 2017
  • Place of Presentation: 京都大学基礎物理学研究所（京都府）
  • Year and Date: 2017-02-20
  • Int'l Joint Research
• [Presentation] 非一様相を考慮した有限温度核物質状態方程式 (2017)
  • Author(s): 中里健一郎
  • Organizer: 第５回中性子星核物質ウィンタースクール・研究会
  • Place of Presentation: 福島飯坂温泉 福すむ宿 福住旅館（福島県）
  • Year and Date: 2017-02-16
• [Presentation] 銀河の金属量進化を考慮した連星ブラックホール合体からの背景重力波 (2016)
  • Author(s): 中里健一郎
  • Organizer: 第29回理論懇シンポジウム「重力が織りなす宇宙の諸階層」
  • Place of Presentation: 東北大学青葉山キャンパス（宮城県）
  • Year and Date: 2016-12-20
• [Presentation] Inhomogeneous nuclear matter in compact stars (2016)
  • Author(s): Ken'ichiro Nakazato
  • Organizer: International Symposium on Neutron Star Matter (NSMAT2016) -Recent Progress in Observations, Experiments and Theories-
  • Place of Presentation: 東北大学青葉山キャンパス（宮城県）
  • Year and Date: 2016-11-21
  • Int'l Joint Research
• [Presentation] 銀河の金属量進化を考慮した連星ブラックホール合体からの背景重力波 (2016)
  • Author(s): 中里健一郎，新納悠，佐合紀親
  • Organizer: 日本物理学会
  • Place of Presentation: 宮崎大学木花キャンパス（宮崎県）
  • Year and Date: 2016-09-21
• [Presentation] 銀河の金属量進化を考慮した連星ブラックホール合体からの背景重力波 (2016)
  • Author(s): 中里健一郎，新納悠，佐合紀親
  • Organizer: 日本天文学会
  • Place of Presentation: 愛媛大学城北キャンパス（愛媛県）
  • Year and Date: 2016-09-14
• [Presentation] Detectability and Uncertainties of the Supernova Relic Neutrino Background (2016)
  • Author(s): Ken'ichiro Nakazato, Eri Mochida, Yuu Niino, Hideyuki Suzuki
  • Organizer: 14th Symposium on Nuclei in the Cosmos
  • Place of Presentation: 朱鷺メッセ 新潟コンベンションセンター（新潟県）
  • Year and Date: 2016-06-19
  • Int'l Joint Research
• [Presentation] Theoretical study of supernova relic neutrinos (2016)
  • Author(s): Ken'ichiro Nakazato
  • Organizer: Revealing the history of the universe with underground particle and nuclear research 2016
  • Place of Presentation: 東京大学本郷キャンパス 小柴ホール（東京都）
  • Year and Date: 2016-05-11
  • Int'l Joint Research / Invited
• [Presentation] SK-Gdによる超新星背景ニュートリノの検出可能性とその不定性 (2016)
  • Author(s): 持田恵里，中里健一郎，新納悠，鈴木英之
  • Organizer: 新学術「地下素核研究」第二回超新星ニュートリノ研究会
  • Place of Presentation: 富山商工会議所（富山県）
  • Year and Date: 2016-01-06
• [Presentation] 原始中性子星における有限温度非一様状態の核物質 (2015)
  • Author(s): 中里健一郎
  • Organizer: 第28回理論懇シンポジウム「宇宙における天体形成から生命まで」
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府）
  • Year and Date: 2015-12-23
• [Presentation] 中性子星の状態方程式 (2015)
  • Author(s): 中里健一郎
  • Organizer: KEK理論センター研究会「原子核・ハドロン物理の課題と将来」
  • Place of Presentation: 高エネルギー加速器研究機構つくばキャンパス（茨城県）
  • Year and Date: 2015-11-24
  • Invited
• [Presentation] 原始中性子星における有限温度非一様状態の核物質 (2015)
  • Author(s): 中里健一郎，富樫甫，竹原裕太，山室早智子，鈴木英之，鷹野正利
  • Organizer: 日本天文学会
  • Place of Presentation: 甲南大学岡本キャンパス（兵庫県）
  • Year and Date: 2015-09-09
• [Presentation] Spectrum of the Supernova Relic Neutrino Background (2015)
  • Author(s): Ken'ichiro Nakazato
  • Organizer: Numazu Workshop 2015: Challenges of modeling supernovae with nuclear data
  • Place of Presentation: 三島商工会議所（静岡県）
  • Year and Date: 2015-09-01
  • Int'l Joint Research / Invited
• [Presentation] Astrophysical Implications of the Symmetry Energy (2015)
  • Author(s): Ken'ichiro Nakazato
  • Organizer: Workshop on Science with SpiRIT TPC
  • Place of Presentation: 理化学研究所和光キャンパス（埼玉県）
  • Year and Date: 2015-06-06
  • Int'l Joint Research / Invited
• [Presentation] Super-Kamiokande及びKamLANDによる超新星ニュートリノ観測の相補的解析による可能性 (2015)
  • Author(s): 林田眞悟，池田一得，石徹白晃治，茅野翼，小汐由介，中里健一郎，高橋亘，梅田秀之，徐宸原，吉田敬
  • Organizer: 日本物理学会 第70回年次大会
  • Place of Presentation: 早稲田大学早稲田キャンパス（東京都）
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] 超新星ニュートリノの理論予測 (2015)
  • Author(s): 中里健一郎
  • Organizer: 日本物理学会 第70回年次大会
  • Place of Presentation: 早稲田大学早稲田キャンパス（東京都）
  • Year and Date: 2015-03-21 – 2015-03-24
  • Invited
• [Presentation] クラスト状態方程式が中性子星半径に与える影響 (2015)
  • Author(s): 石塚知香子，中里健一郎，大西明
  • Organizer: 日本物理学会 第70回年次大会
  • Place of Presentation: 早稲田大学早稲田キャンパス（東京都）
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] 軟ガンマ線リピーターの再帰的バーストに対する自己組織化臨界モデル (2014)
  • Author(s): 中里健一郎
  • Organizer: 第27回理論懇シンポジウム「理論天文学・宇宙物理学と境界領域」
  • Place of Presentation: 国立天文台三鷹キャンパス（東京都）
  • Year and Date: 2014-12-24 – 2014-12-26
• [Presentation] Supernova Explosion and Black Hole Formation with QCD Phase Transition (2014)
  • Author(s): Ken'ichiro Nakazato
  • Organizer: Quarks and Compact Stars
  • Place of Presentation: KIAA, Peking University, Beijing, China
  • Year and Date: 2014-10-20 – 2014-10-22
  • Invited
• [Presentation] Variational study of the supernova equation of state with realistic nuclear forces (2014)
  • Author(s): Hajime Togashi, Yuta Takehara, Sachiko Yamamuro, Ken'ichiro Nakazato, Hideyuki Suzuki, Kohsuke Sumiyoshi, Masatoshi Takano
  • Organizer: 4th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
  • Place of Presentation: Hilton Waikoloa Village, Waikoloa, Hawaii, USA
  • Year and Date: 2014-10-07 – 2014-10-11
• [Presentation] Stellar core collapse with QCD phase transition (2014)
  • Author(s): Ken'ichiro Nakazato
  • Organizer: Compact Stars in the QCD Phase diagram IV
  • Place of Presentation: Kino Prerow, Prerow, Germany
  • Year and Date: 2014-09-26 – 2014-09-29
  • Invited
• [Presentation] 軟ガンマ線リピーターの再帰的バーストに対する自己組織化臨界モデル (2014)
  • Author(s): 中里健一郎
  • Organizer: 日本天文学会
  • Place of Presentation: 山形大学小白川キャンパス（山形県）
  • Year and Date: 2014-09-11 – 2014-09-13
• [Presentation] 銀河の金属量進化を考慮した超新星背景ニュートリノのスペクトル予測 (2014)
  • Author(s): 持田恵里，中里健一郎，新納悠，鈴木英之
  • Organizer: 日本天文学会
  • Place of Presentation: 山形大学小白川キャンパス（山形県）
  • Year and Date: 2014-09-11 – 2014-09-13
• [Presentation] 星形成史と超新星背景ニュートリノ (2014)
  • Author(s): 中里健一郎
  • Organizer: 宇宙の歴史をひもとく地下素粒子原子核研究 第一回研究会
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府）
  • Year and Date: 2014-08-23 – 2014-08-24
  • Invited
• [Remarks] Web site of Supernova Relic Neutrino Background
  • URL: http://asphwww.ph.noda.tus.ac.jp/srn/