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Accurate Modelling to Extract the Variety of Information from the Imminent Detection of Gravitational Waves from Binary Neutron Stars

Research Project

Project/Area Number 17K14305
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionKobe City College of Technology

Principal Investigator

TAKAMI Kentaro  神戸市立工業高等専門学校, その他部局等, 准教授 (70758002)

Project Period (FY) 2017-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords重力波 / 連星中性子星 / 数値相対論 / 高密度状態方程式 / クォーク物質 / クロスオーバー相転移 / 状態方程式 / 大質量星 / 大質量性
Outline of Final Research Achievements

In 2015, gravitational waves from the coalescence of binary black holes were observed for the first time in the world, and in 2017, the observation of gravitational waves from the coalescence of binary neutron stars and the accompanying short gamma-ray bursts was also successfully done. Therefore, it is time to understand the various physical phenomena in coalescences of binary neutron stars through gravitational waves.

In this study, we have used a hybrid equation of state which takes into account the thermal contribution by an ideal fluids to compute binary neutron star mergers. Thanks to the treatment of the equation of state, we are allowed to use various cutting edge equation of states, including quark matter. We have investigated the dynamics for and the gravitational waves from binary neutron star mergers, which depend on the equation of states and masses.

Academic Significance and Societal Importance of the Research Achievements

アインシュタインが重力波の存在を理論的に予言してから約100年が経ち、遂に私達は重力波を観測することができるようになりました。これは、既存の電磁波などを用いた観測とは全く異なる新しい「目」を手に入れたことになり、重力波天文学の発展が期待されています。この新しい目は、例えば、極限環境である連星中性子星合体を見ることを可能にします。本研究成果は、この目を使って、地球上では再現することが出来ない核密度を超える高密度状態の性質などを連星中性子星合体を通して調べる方法を提供し、人類の知見を広げるのに役立ちます。

Report

(8 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (31 results)

All 2022 2019 2018 2017 Other

All Int'l Joint Research (14 results) Journal Article (6 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 6 results) Remarks (4 results)

  • [Int'l Joint Research] Goethe University Frankfurt/Frankfurt Institute for Advanced Studies(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Chinese Academy of Science/University of Science and Technology(中国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Goethe University Frankfurt/Frankfurt Institute for Advanced Studies(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Chinese Academy of Science/University of Science and Technology(中国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Goethe University Frankfurt/Frankfurt Institute for Advanced Studies(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Goethe University Frankfurt/Frankfurt Institute for Advanced Studies(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Goethe University Frankfurt/Frankfurt Institute for Advanced Studies(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Monash University/ARC of Excellence for GW Discovery(オーストラリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Goethe University Frankfurt/Frankfurt Institute for Advanced Studies(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Monash University/ARC of Excellence for GW Discovery(オーストラリア)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Goethe University Frankfurt/Frankfurt Institute for Advanced Studies(Germany)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] IUCAA(India)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Washington State University/Pennsylvania State University(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Cardiff University(United Kingdom)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Merger and Postmerger of Binary Neutron Stars with a Quark-Hadron Crossover Equation of State2022

    • Author(s)
      Huang Yong-Jia、Baiotti Luca、Kojo Toru、Takami Kentaro、Sotani Hajime、Togashi Hajime、Hatsuda Tetsuo、Nagataki Shigehiro、Fan Yi-Zhong
    • Journal Title

      Physical Review Letters

      Volume: 129 Issue: 18 Pages: 181101-181101

    • DOI

      10.1103/physrevlett.129.181101

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Computing fast and reliable gravitational waveforms of binary neutron star merger remnants2019

    • Author(s)
      Easter Paul J.、Lasky Paul D.、Casey Andrew R.、Rezzolla Luciano、Takami Kentaro
    • Journal Title

      Physical Review D

      Volume: 100 Issue: 4 Pages: 1-7

    • DOI

      10.1103/physrevd.100.043005

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Computing Fast and Reliable Gravitational Waveforms of Binary Neutron Star Merger Re mnants2019

    • Author(s)
      Paul J. Easter, Paul D. Lasky, Andrew R. Casey, Luciano Rezzolla, Kentaro Takami
    • Journal Title

      Physical Review D (投稿中)

      Volume: 0 Pages: 1-6

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Sukanta Bose, Kabir Chakravarti, Luciano Rezzolla, B. S. Sathyaprakash, Kentaro Takami2018

    • Author(s)
      10.1103/PhysRevLett.120.031102
    • Journal Title

      Physical Review Letters

      Volume: 120 Issue: 3 Pages: 031102-031102

    • DOI

      10.1103/physrevlett.120.031102

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Rotational properties of hypermassive neutron stars from binary mergers2017

    • Author(s)
      Matthias Hanauskem, Kentaro Takami, Luke Bovard, Luciano Rezzolla, Jos\'{e} A. Font, Filippo Galeazzi, Horst St\"ocker
    • Journal Title

      Physical Review D

      Volume: 96 Issue: 4 Pages: 043004-043004

    • DOI

      10.1103/physrevd.96.043004

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] oncluding Remarks: Connecting Relativistic Heavy Ion Collisions and Neutron Star Merg ers by the Equation of State of Dense Hadron- and Quark Matter as signalled by Gravitatio nal Waves2017

    • Author(s)
      Matthias Hanauskem, Jan Steinheimer, Luke Bovard, Ayon Mukherjee, Stefan Schramm, Kentaro Takami, Jens Papenfort, Natascha Wechselberger, Luciano Rezzolla, Horst St\"ocker
    • Journal Title

      Journal of Physics Conference Series

      Volume: 878 Pages: 012031-012031

    • DOI

      10.1088/1742-6596/878/1/012031

    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] NR Waveforms from BNS Mergers and the Utilizations2019

    • Author(s)
      Kentaro TAKAMI
    • Organizer
      Workshop to bring together experts on High Energy Astrophysics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 今話題の「重力波」ってなぁに?2018

    • Author(s)
      高見健太郎
    • Organizer
      ナレッジキャピタル大学校 (後援:総務省など)
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 相対論的天体現象に関する理論的研究2018

    • Author(s)
      高見健太郎
    • Organizer
      ナレッジキャピタル大学校 (後援:総務省など)
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 宇宙大討論会2018

    • Author(s)
      羽生宏人,松本健,永崎将利,磯部洋明,高見健太郎
    • Organizer
      ナレッジキャピタル大学校 (後援:総務省など)
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 中性子星合体シミュレーションと状態方程式2018

    • Author(s)
      高見健太郎
    • Organizer
      iTHEMS-Kyushu WS - from particles and nuclei to cosmos-
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Neutron-star Radius from a Population of Binary Neutron Star Mergers2017

    • Author(s)
      Kentaro Takami
    • Organizer
      TWENTY-SEVENTH WORKSHOP ON GENERAL RELATIVITY AND GRAVITATION in JAPAN
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 連星中性子星合体からの重力波と状態方程式2017

    • Author(s)
      高見健太郎
    • Organizer
      X線天体と元素合成を中心とする宇宙核物理研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Remarks] Gravitational-Waveform Catalog

    • URL

      http://www.kobe-kosen.ac.jp/~takami/KTakami/contents/research/public_data/GW_Catalog/GW_Catalog_en.html

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report
  • [Remarks] Gravitational‐Waveform Catalog

    • URL

      http://www.kobe-kosen.ac.jp/~takami/KTakami/contents/research/public_data/GW_Catalog/GW_Catalog_ja.html

    • Related Report
      2020 Research-status Report
  • [Remarks] Gravitational-Waveform Catalog

    • URL

      http://www.kobe-kosen.ac.jp/~takami/KTakami/contents/research/public_data/GW_Catalog/GW_Catalog_ja.html

    • Related Report
      2019 Research-status Report 2018 Research-status Report
  • [Remarks] Gravitational-Waveform Catalog

    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2025-01-30  

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