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Elucidating the Origin of Gravitational Wave Sources Using Binary Evolution Theory

Research Project

Project/Area Number 21K13915
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionShinshu University (2023)
The University of Tokyo (2021-2022)

Principal Investigator

Kinugawa Tomoya  信州大学, 工学部, 准教授 (90779159)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords連星進化 / 重力波 / マルチメッセンジャー天文学 / ブラックホール / 中性子星 / 大質量星 / 初代星 / 白色矮星 / 連星ブラックホール
Outline of Research at the Start

2015年9月14日、世界で初めて重力波(GW150914)が直接観測された。重力波の存在が直接証明されたことにより、今後の重力波研究は、重力波を用いてどの様に天体の物理を解明していくかというフェイズに切り替わりつつある。重力波観測のメインターゲットはコンパクト連星の合体である。重力波による連星合体までの時間は数億年から宇宙年齢以上と非常に長いため、重力波源として宇宙初期からの寄与が有力視されている。したがって、宇宙初期からの各時代での連星の特徴を明らかにし、重力波観測結果からどのような星の進化、形成情報が得られるかの考察が急務である。重力波観測と理論の比較により星進化の物理の解明を目指す。

Outline of Final Research Achievements

During this research period, a total of 10 papers were published. These studies cover a wide range of topics, including investigations into the progenitors of gravitational wave detections by the LIGO collaboration, research on science targets for future gravitational wave observations, papers aiming to constrain black hole formation theories by combining gravitational wave and radio observations, as well as studies on binary formation. Additionally, I delivered two invited talks at international conferences during this research period, indicating the global recognition and significance of our research findings.

Academic Significance and Societal Importance of the Research Achievements

宇宙の初期に存在した星々(初代星)を理解するための重要な一歩です。初代星は、宇宙が誕生してから最初に形成された星々であり、その性質や進化を知ることは、宇宙の歴史を解明する上で極めて重要です。初代星は、宇宙の最初期に存在したため、現在は直接観測することが困難です。しかし、これらの星が残したブラックホールの観測を通じて、その存在を間接的に確認することができます。ブラックホールはブラックホール同士が合体する際に放出する重力波によって観測することができます。重力波を用いて初代星のブラックホール連星系を観測し、それらの形成過程や質量分布を明らかにすることを目指しています。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (12 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (2 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Int'l Joint Research] ヴァージニア工科大学(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Search for a Black Hole Binary in Gaia DR3 Astrometric Binary Stars with Spectroscopic Data2023

    • Author(s)
      Tanikawa Ataru , Hattori Kohei , Kawanaka Norita , Kinugawa Tomoya , Shikauchi Minori , Tsuna Daichi
    • Journal Title

      The Astrophysical Journal

      Volume: 946 Issue: 2 Pages: 79-79

    • DOI

      10.3847/1538-4357/acbf36

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Merger Conditions of Population III Protostar Binaries2023

    • Author(s)
      Kirihara Takanobu、Susa Hajime、Hosokawa Takashi、Kinugawa Tomoya
    • Journal Title

      The Astrophysical Journal

      Volume: 950 Issue: 2 Pages: 188-188

    • DOI

      10.3847/1538-4357/acd1e0

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Can Population III stars be major origins of both merging binary black holes and extremely metal poor stars?2022

    • Author(s)
      Tanikawa Ataru、Chiaki Gen、Kinugawa Tomoya、Suwa Yudai、Tominaga Nozomu
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 74 Issue: 3 Pages: 521-532

    • DOI

      10.1093/pasj/psac010

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Constraints on population I/II neutron star-black hole binary formation by gravitational wave and radio observations2022

    • Author(s)
      Kinugawa Tomoya、Nakamura Takashi、Nakano Hiroyuki
    • Journal Title

      Monthly Notices of the Royal Astronomical Society: Letters

      Volume: 515 Issue: 1 Pages: L78-L83

    • DOI

      10.1093/mnrasl/slac073

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Probe for Type Ia Supernova Progenitor in Decihertz Gravitational Wave Astronomy2022

    • Author(s)
      Kinugawa Tomoya、Takeda Hiroki、Tanikawa Ataru、Yamaguchi Hiroya
    • Journal Title

      The Astrophysical Journal

      Volume: 938 Issue: 1 Pages: 52-52

    • DOI

      10.3847/1538-4357/ac9135

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Merger Rate Density of Binary Black Holes through Isolated Population I, II, III and Extremely Metal-poor Binary Star Evolution2022

    • Author(s)
      Tanikawa Ataru、Yoshida Takashi、Kinugawa Tomoya、Trani Alessandro A.、Hosokawa Takashi、Susa Hajime、Omukai Kazuyuki
    • Journal Title

      The Astrophysical Journal

      Volume: 926 Issue: 1 Pages: 83-83

    • DOI

      10.3847/1538-4357/ac4247

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gravitational waves from Population III binary black holes are consistent with LIGO/Virgo O3a data for the chirp mass larger than ?20 M?2021

    • Author(s)
      Kinugawa Tomoya、Nakamura Takashi、Nakano Hiroyuki
    • Journal Title

      Monthly Notices of the Royal Astronomical Society: Letters

      Volume: 504 Issue: 1 Pages: L28-L33

    • DOI

      10.1093/mnrasl/slab032

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the population III binary black hole mergers beyond the pair-instability mass gap2021

    • Author(s)
      Hijikawa Kotaro、Tanikawa Ataru、Kinugawa Tomoya、Yoshida Takashi、Umeda Hideyuki
    • Journal Title

      Monthly Notices of the Royal Astronomical Society: Letters

      Volume: 505 Issue: 1 Pages: L69-L73

    • DOI

      10.1093/mnrasl/slab052

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Population III binary black holes: effects of convective overshooting on formation of GW1905212021

    • Author(s)
      Tanikawa Ataru、Kinugawa Tomoya、Yoshida Takashi、Hijikawa Kotaro、Umeda Hideyuki
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 505 Issue: 2 Pages: 2170-2176

    • DOI

      10.1093/mnras/stab1421

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Impact of binary interactions on the diffuse supernova neutrino background2023

    • Author(s)
      Tomoya Kinugawa
    • Organizer
      6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Remnants of first stars for gravitational wave sources2021

    • Author(s)
      Tomoya Kinugawa
    • Organizer
      nuclear burning in massive stars
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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