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Probing the physics for the high density region via gravitational waves from supernovae

Research Project

Project/Area Number 17K05458
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionInstitute of Physical and Chemical Research (2019)
National Astronomical Observatory of Japan (2017-2018)

Principal Investigator

Sotani Hajime  国立研究開発法人理化学研究所, 開拓研究本部, 研究員 (70386720)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords宇宙物理 / 重力波 / 状態方程式 / 原始中性子星 / 中性子星
Outline of Final Research Achievements

The core-collapse supernova explosions are one of the most promising gravitational wave sources. In this study, in order to understand the gravitational wave signals appearing in the numerical simulations, we systematically study the gravitational wave frequencies of the protoneutron stars via asteroseismology, which is a perturbative approach. Then, we find that one would extract the time evolution of the average density of protoneutron star via gravitational wave observations. We also find that in the case of the black hole formation, one could get the information about the protoneutron star with the maximum mass by simultaneous observations of neutrino and gravitational waves.

Academic Significance and Societal Importance of the Research Achievements

重い星の最期に起こる超新星爆発後に残される中性子星内部の密度は原子核密度よりずっと大きいため、地上実験からその物理的な特性を決めることは非常に困難である。そのため、このような高密度天体の観測を通して、逆に高密度領域での物理を垣間見ることができるわけである。本研究では重力波という物理量に着目し、超新星爆発後の高密度天体内部の情報を抜き出すことを目指した。これにより、原子核物理が提唱する高密度領域における物理に、天体観測から制限を与えることができるかもしれない。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (29 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (4 results) Journal Article (13 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 13 results) Presentation (12 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results)

  • [Int'l Joint Research] モンタナ州立大学(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ローマ大学(イタリア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Tuebingen(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of Tuebingen(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Light curves from highly compact neutron stars with spot size effect2020

    • Author(s)
      Sotani Hajime
    • Journal Title

      Physical Review D

      Volume: 101 Issue: 6

    • DOI

      10.1103/physrevd.101.063013

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dependence of the outer boundary condition on protoneutron star asteroseismology with gravitational-wave signatures2019

    • Author(s)
      Sotani Hajime , Kuroda Takami , Takiwaki Tomoya , Kotake Kei
    • Journal Title

      Physical Review D

      Volume: 99 Issue: 12 Pages: 123024-123024

    • DOI

      10.1103/physrevd.99.123024

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Finite size effects on the light curves of slowly-rotating neutron stars2019

    • Author(s)
      Sotani Hajime、Silva Hector O.、Pappas George
    • Journal Title

      Physical Review D

      Volume: 100 Issue: 4

    • DOI

      10.1103/physrevd.100.043006

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Determination of properties of protoneutron stars toward black hole formation via gravitational wave observations2019

    • Author(s)
      Sotani Hajime、Sumiyoshi Kohsuke
    • Journal Title

      Physical Review D

      Volume: 100 Issue: 8 Pages: 083008-083008

    • DOI

      10.1103/physrevd.100.083008

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Astrophysical implications of double-layer torsional oscillations in a neutron star crust as a lasagna sandwich2019

    • Author(s)
      Hajime Sotani, Kei Iida, and Kazuhiro Oyamatsu
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 489 Pages: 3022-3030

    • DOI

      10.1093/mnras/stz2385

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Compactness of neutron stars and Tolman VII solutions in scalar-tensor gravity2018

    • Author(s)
      Sotani Hajime、Kokkotas Kostas D.
    • Journal Title

      Physical Review D

      Volume: 97 Issue: 12

    • DOI

      10.1103/physrevd.97.124034

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Constraints on the nuclear equation of state and the neutron star structure from crustal torsional oscillations2018

    • Author(s)
      Sotani Hajime、Iida Kei、Oyamatsu Kazuhiro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 479 Issue: 4 Pages: 4735-4748

    • DOI

      10.1093/mnras/sty1755

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pulse profiles of highly compact pulsars in general relativity2018

    • Author(s)
      Sotani Hajime、Miyamoto Umpei
    • Journal Title

      Physical Review D

      Volume: 98 Issue: 4 Pages: 1-12

    • DOI

      10.1103/physrevd.98.044017

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Systematical study of pulsar light curves with special relativistic effects2018

    • Author(s)
      Sotani Hajime、Miyamoto Umpei
    • Journal Title

      Physical Review D

      Volume: 98 Issue: 10 Pages: 1-14

    • DOI

      10.1103/physrevd.98.103019

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Probing crustal structures from neutron star compactness2017

    • Author(s)
      Sotani Hajime、Iida Kei、Oyamatsu Kazuhiro
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 470 Issue: 4 Pages: 4397-4407

    • DOI

      10.1093/mnras/stx1510

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Probing mass-radius relation of protoneutron stars from gravitational-wave asteroseismology2017

    • 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

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Sensitivity of pulsar light curves to spacetime geometry and efficacy of analytic approximations2017

    • Author(s)
      Hajime Sotani, Umpei Miyamoto
    • Journal Title

      Physical Review D

      Volume: 96 (2017) no.10, 104018 Issue: 10 Pages: 1-20

    • DOI

      10.1103/physrevd.96.104018

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pulse profiles from a pulsar in scalar-tensor gravity2017

    • Author(s)
      Sotani Hajime
    • Journal Title

      Physical Review D

      Volume: 96 Issue: 10

    • DOI

      10.1103/physrevd.96.104010

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] ブラックホール形成を伴う超新星での重力波星震学2020

    • Author(s)
      祖谷元,住吉光介
    • Organizer
      日本物理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Crustal torsional oscillations inside the deeper pasta structures2019

    • Author(s)
      Sotani Hajime
    • Organizer
      STARS2019/SMFNS2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ズレ振動における中性子星クラスト中パスタの効果とその重要性2019

    • Author(s)
      祖谷元,飯田圭,親松和浩
    • Organizer
      日本物理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Double-layer torsional oscillations in a neutron star crust as a lasagna sandwich2019

    • Author(s)
      Sotani Haime
    • Organizer
      9th International Symposium on Nuclear Symmetry Energy (NuSYM2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Crustal torsional oscillations and nuclear saturation parameters2019

    • Author(s)
      Sotani Hajime
    • Organizer
      Xiamen-CUSTIPEN Workshop on the EOS of Dense Neutron-Rich Matter in the Era of Gravitational Wave Astronomy
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Constraint on the equation of state from the quasi-periodic oscillations in ginat flares2018

    • Author(s)
      Sotani Hajime、Iida Kei、Oyamatsu Kazuhiro
    • Organizer
      Fifteenth Marcel Grossmann Meeting - MG15
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Constraint on the equation of state via supernova gravitational waves2018

    • Author(s)
      Sotani Hajime、Kuroda Takami、Takiwaki Tomoya、Kotake Kei
    • Organizer
      Fifteenth Marcel Grossmann Meeting - MG15
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gravitational waves from protoneutron stars and nuclear EOS2018

    • Author(s)
      Sotani Hajime
    • Organizer
      IWARA2018 - 8th International Workshop on Astronomy and Relativistic Astrophysics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Impact of nuclear symmetry energy on neutron star structure and crustal oscillations2018

    • Author(s)
      Sotani Hajime
    • Organizer
      HAWAII2018 -5th JOINT MEETING OF THE NUCLEAR PHYSICS DIVISIONS OF THE APS and The JPS-
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] クラスト振動の系統的解析:棒状原子核層の効果と中性子星半径・質量への制限2018

    • Author(s)
      祖谷元、飯田圭、親松和浩
    • Organizer
      日本物理学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 星震学による中性子星核物質の探究2017

    • Author(s)
      祖谷元
    • Organizer
      日本物理学会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Gravitational wave asteroseismology with protoneutron stars2017

    • Author(s)
      Hajime Sotani
    • Organizer
      29th International Texas Symposium on Relativistic Astrophysics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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