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2021 Fiscal Year Annual Research Report

Theoretical study of the mass and angular momentum distribution of primordial black holes

Research Project

Project/Area Number 19H01895
Research InstitutionNagoya University

Principal Investigator

柳 哲文  名古屋大学, 理学研究科, 講師 (60467404)

Co-Investigator(Kenkyū-buntansha) 大川 博督  早稲田大学, 高等研究所, 准教授(任期付) (40633285)
原田 知広  立教大学, 理学部, 教授 (60402773)
佐々木 節  東京大学, カブリ数物連携宇宙研究機構, 特任教授 (70162386)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords原始ブラックホール
Outline of Annual Research Achievements

これまでに積み上げてきた数値計算コードを整理し,格子細分化法を導入することで,輻射優勢期における回転を含めた原始ブラックホール(PBH:Primordial Black Hole)形成シミュレーションを可能にした.これにより,非等方性の影響や,球対称の場合に確認されている臨界重力崩壊現象の実現性等,今後のより詳細な非球対称PBH形成ダイナミクスの研究に道筋をつけた.
近似的なPBHの角運動量分布の見積もりを応用し,PBH連星における有効スピンの初期統計性を理論的に明らかにした.この有効スピンは連星ブラックホール合体からの重力波の観測における観測量の一つであり,重要な研究実績の一つである.また,今後のより一般的な状況でのPBH連星スピンの統計的取り扱いに道筋をつけた点でも大きな意義を持つ.
PBH形成において標準的なシナリオは輻射優勢期における形成であり,そのダイナミクスにおいては輻射流体の圧力勾配と重力が大きな要素となるが,初期宇宙における一時的な物質優勢期におけるPBH形成においては,圧力が小さいため,物質要素の速度分散が無視できないと期待されている.本研究ではこの速度分散の効果を始めて見積もり,重力崩壊する系の非等方性や回転によってブラックホール形成が阻害される効果と同等の効果が期待されることを明らかにした.これは今後の物質優勢期におけるPBH形成のより詳細な研究を行う上で重要な研究成果である.

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

  • Research Products

    (56 results)

All 2023 2022 2021 Other

All Int'l Joint Research (5 results) Journal Article (34 results) (of which Int'l Joint Research: 12 results,  Peer Reviewed: 34 results) Presentation (17 results) (of which Int'l Joint Research: 9 results,  Invited: 6 results)

  • [Int'l Joint Research] Universite Libre de Bruxelles(ベルギー)

    • Country Name
      BELGIUM
    • Counterpart Institution
      Universite Libre de Bruxelles
  • [Int'l Joint Research] Pusan National University/APCTP/KIAS(韓国)

    • Country Name
      KOREA (REP. OF KOREA)
    • Counterpart Institution
      Pusan National University/APCTP/KIAS
  • [Int'l Joint Research] National Taiwan University(その他の国・地域)

    • Country Name
      その他の国・地域
    • Counterpart Institution
      National Taiwan University
  • [Int'l Joint Research] University of Cambridge(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      University of Cambridge
  • [Int'l Joint Research] Princeton University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Princeton University
  • [Journal Article] Stationary vacuum bubble in a Kerr-de Sitter spacetime2023

    • Author(s)
      Saito Daiki、Yoo Chul-Moon
    • Journal Title

      Physical Review D

      Volume: 107 Pages: 064043

    • DOI

      10.1103/PhysRevD.107.064043

    • Peer Reviewed
  • [Journal Article] Einstein-Vlasov system with equal-angular momenta in AdS52023

    • Author(s)
      Asami Hiroki、Yoo Chul-Moon、Kitaku Ryo、Uemichi Keiya
    • Journal Title

      Physical Review D

      Volume: 107 Pages: 064022

    • DOI

      10.1103/PhysRevD.107.064022

    • Peer Reviewed
  • [Journal Article] Threshold of primordial black hole formation againstvelocity dispersion in matter-dominated era2023

    • Author(s)
      Harada Tomohiro、Kohri Kazunori、Sasaki Misao、Terada Takahiro、Yoo Chul-Moon
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2023 Pages: 038~038

    • DOI

      10.1088/1475-7516/2023/02/038

    • Peer Reviewed
  • [Journal Article] A novel Lagrangian formulation to construct relativistic rotating stars: towards its application to their evolution calculations2023

    • Author(s)
      Okawa Hirotada、Fujisawa Kotaro、Yasutake Nobutoshi、Ogata Misa、Yamamoto Yu、Yamada Shoichi
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 520 Pages: 24~43

    • DOI

      10.1093/mnras/stad075

    • Peer Reviewed
  • [Journal Article] Testing the non-circularity of the spacetime around Sagittarius A* with orbiting pulsars2022

    • Author(s)
      Takamori Yohsuke、Naruko Atsushi、Sakurai Yusuke、Takahashi Keitaro、Yamauchi Daisuke、Yoo Chul-Moon
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 75 Pages: S217~S231

    • DOI

      10.1093/pasj/psac003

    • Peer Reviewed
  • [Journal Article] Primordial black hole formation from massless scalar isocurvature2022

    • Author(s)
      Yoo Chul-Moon、Harada Tomohiro、Hirano Shin’ichi、Okawa Hirotada、Sasaki Misao
    • Journal Title

      Physical Review D

      Volume: 105 Pages: 103538

    • DOI

      10.1103/PhysRevD.105.103538

    • Peer Reviewed
  • [Journal Article] Simulation of primordial black holes with large negative non-Gaussianity2022

    • Author(s)
      Escriva Albert、Tada Yuichiro、Yokoyama Shuichiro、Yoo Chul-Moon
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2022 Pages: 012~012

    • DOI

      10.1088/1475-7516/2022/05/012

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gravothermal catastrophe and critical dimension in a D-dimensional asymptotically AdS spacetime2022

    • Author(s)
      Asami Hiroki、Yoo Chul-Moon
    • Journal Title

      Physical Review D

      Volume: 106 Pages: 044065

    • DOI

      10.1103/PhysRevD.106.044065

    • Peer Reviewed
  • [Journal Article] Effective Inspiral Spin Distribution of Primordial Black Hole Binaries2022

    • Author(s)
      Koga Yasutaka、Harada Tomohiro、Tada Yuichiro、Yokoyama Shuichiro、Yoo Chul-Moon
    • Journal Title

      The Astrophysical Journal

      Volume: 939 Pages: 65~65

    • DOI

      10.3847/1538-4357/ac93f1

    • Peer Reviewed
  • [Journal Article] The Basics of Primordial Black Hole Formation and Abundance Estimation2022

    • Author(s)
      Yoo Chul-Moon
    • Journal Title

      Galaxies

      Volume: 10 Pages: 112~112

    • DOI

      10.3390/galaxies10060112

    • Peer Reviewed
  • [Journal Article] Primordial black holes from CDM isocurvature perturbations2022

    • Author(s)
      Passaglia Samuel、Sasaki Misao
    • Journal Title

      Physical Review D

      Volume: 105 Pages: 103530

    • DOI

      10.1103/PhysRevD.105.103530

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Establishing the Nonprimordial Origin of Black Hole-Neutron Star Mergers2022

    • Author(s)
      Sasaki Misao、Takhistov Volodymyr、Vardanyan Valeri、Zhang Ying-li
    • Journal Title

      The Astrophysical Journal

      Volume: 931 Pages: 2~2

    • DOI

      10.3847/1538-4357/ac66da

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] One small step for an inflaton, one giant leap for inflation: A novel non-Gaussian tail and primordial black holes2022

    • Author(s)
      Cai Yi-Fu、Ma Xiao-Han、Sasaki Misao、Wang Dong-Gang、Zhou Zihan
    • Journal Title

      Physics Letters B

      Volume: 834 Pages: 137461~137461

    • DOI

      10.1016/j.physletb.2022.137461

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Resolving information loss paradox with Euclidean path integral2022

    • Author(s)
      Chen Pisin、Sasaki Misao、Yeom Dong-Han、Yoon Junggi
    • Journal Title

      International Journal of Modern Physics D

      Volume: 31 Pages: 2242001

    • DOI

      10.1142/S0218271822420019

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Graviton non-gaussianity in α-vacuum2022

    • Author(s)
      Kanno Sugumi、Sasaki Misao
    • Journal Title

      Journal of High Energy Physics

      Volume: 2022 Pages: 210

    • DOI

      10.1007/JHEP08(2022)210

    • Peer Reviewed
  • [Journal Article] Highly non-Gaussian tails and primordial black holes from single-field inflation2022

    • Author(s)
      Cai Yi-Fu、Ma Xiao-Han、Sasaki Misao、Wang Dong-Gang、Zhou Zihan
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2022 Pages: 034~034

    • DOI

      10.1088/1475-7516/2022/12/034

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Non-Gaussianity effects on the primordial black hole abundance for sharply-peaked primordial spectrum2022

    • Author(s)
      Matsubara Takahiko、Sasaki Misao
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2022 Pages: 094~094

    • DOI

      10.1088/1475-7516/2022/10/094

    • Peer Reviewed
  • [Journal Article] Robustness of particle creation in the formation of a compact object2022

    • Author(s)
      Okabayashi Kazumasa、Harada Tomohiro、Nakao Ken-ichi
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2022 Pages: 023E02

    • DOI

      10.1093/ptep/ptac006

    • Peer Reviewed
  • [Journal Article] Complete classification of Friedmann-Lemaitre-Robertson-Walker solutions with linear equation of state: parallelly propagated curvature singularities for general geodesics2022

    • Author(s)
      Harada Tomohiro、Igata Takahisa、Sato Takuma、Carr Bernard
    • Journal Title

      Classical and Quantum Gravity

      Volume: 39 Pages: 145008~145008

    • DOI

      10.1088/1361-6382/ac776e

    • Peer Reviewed
  • [Journal Article] Thakurta metric does not describe a cosmological black hole2022

    • Author(s)
      Harada Tomohiro、Maeda Hideki、Sato Takuma
    • Journal Title

      Physics Letters B

      Volume: 833 Pages: 137332~137332

    • DOI

      10.1016/j.physletb.2022.137332

    • Peer Reviewed
  • [Journal Article] Conformally Schwarzschild cosmological black holes2022

    • Author(s)
      Sato Takuma、Maeda Hideki、Harada Tomohiro
    • Journal Title

      Classical and Quantum Gravity

      Volume: 39 Pages: 215011~215011

    • DOI

      10.1088/1361-6382/ac902f

    • Peer Reviewed
  • [Journal Article] Radiative gravastar with Gibbons-Hawking temperature2022

    • Author(s)
      Nakao Ken-ichi、Okabayashi Kazumasa、Harada Tomohiro
    • Journal Title

      Physical Review D

      Volume: 106 Pages: 105006

    • DOI

      10.1103/PhysRevD.106.105006

    • Peer Reviewed
  • [Journal Article] Axion cloud decay due to the axion?photon conversion with background magnetic fields2021

    • Author(s)
      Yoo Chul-Moon、Naruko Atsushi、Sakurai Yusuke、Takahashi Keitaro、Takamori Yohsuke、Yamauchi Daisuke
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 74 Pages: 64~72

    • DOI

      10.1093/pasj/psab110

    • Peer Reviewed
  • [Journal Article] Thermal equilibrium states and instability of self-gravitating particles in an asymptotically AdS spacetime2021

    • Author(s)
      Asami Hiroki、Yoo Chul-Moon
    • Journal Title

      Classical and Quantum Gravity

      Volume: 38 Pages: 165014~165014

    • DOI

      10.1088/1361-6382/ac129e

    • Peer Reviewed
  • [Journal Article] Primordial black holes in peak theory with a non-Gaussian tail2021

    • Author(s)
      Kitajima Naoya、Tada Yuichiro、Yokoyama Shuichiro、Yoo Chul-Moon
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2021 Pages: 053~053

    • DOI

      10.1088/1475-7516/2021/10/053

    • Peer Reviewed
  • [Journal Article] False vacuum decay in rotating BTZ spacetimes2021

    • Author(s)
      Saito Daiki、Yoo Chul-Moon
    • Journal Title

      Physical Review D

      Volume: 104 Pages: 124037

    • DOI

      10.1103/PhysRevD.104.124037

    • Peer Reviewed
  • [Journal Article] On problems with cosmography in cosmic dark ages2021

    • Author(s)
      Banerjee A., Colgain E.、Sasaki M.、Sheikh-Jabbari M.M.、Yang T.
    • Journal Title

      Physics Letters B

      Volume: 818 Pages: 136366~136366

    • DOI

      10.1016/j.physletb.2021.136366

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Gravitational wave constraints on the primordial black hole dominated early universe2021

    • Author(s)
      Domenech Guillem、Lin Chunshan、Sasaki Misao
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2021 Pages: 062~062

    • DOI

      10.1088/1475-7516/2021/04/062

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Approximate gauge independence of the induced gravitational wave spectrum2021

    • Author(s)
      Domenech Guillem、Sasaki Misao
    • Journal Title

      Physical Review D

      Volume: 103 Pages: 063531

    • DOI

      10.1103/PhysRevD.103.063531

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cosmology of strongly interacting fermions in the early universe2021

    • Author(s)
      Domenech Guillem、Sasaki Misao
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2021 Pages: 030~030

    • DOI

      10.1088/1475-7516/2021/06/030

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Exploring evaporating primordial black holes with gravitational waves2021

    • Author(s)
      Domenech Guillem、Takhistov Volodymyr、Sasaki Misao
    • Journal Title

      Physics Letters B

      Volume: 823 Pages: 136722~136722

    • DOI

      10.1016/j.physletb.2021.136722

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Beating the Lyth Bound by Parametric Resonance during Inflation2021

    • Author(s)
      Cai Yi-Fu、Jiang Jie、Sasaki Misao、Vardanyan Valeri、Zhou Zihan
    • Journal Title

      Physical Review Letters

      Volume: 127 Pages: 251301

    • DOI

      10.1103/PhysRevLett.127.251301

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Stability of small charged anti-de Sitter black holes in the Robin boundary2021

    • Author(s)
      Katagiri Takuya、Harada Tomohiro
    • Journal Title

      Classical and Quantum Gravity

      Volume: 38 Pages: 135026~135026

    • DOI

      10.1088/1361-6382/abfed6

    • Peer Reviewed
  • [Journal Article] Backreaction of mass and angular momentum accretion on black holes: General formulation of metric perturbations and application to the Blandford-Znajek process2021

    • Author(s)
      Kimura Masashi、Harada Tomohiro、Naruko Atsushi、Toma Kenji
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2021 Pages: 093E03

    • DOI

      10.1093/ptep/ptab101

    • Peer Reviewed
  • [Presentation] Spacetime structure of type II PBH formation2023

    • Author(s)
      柳哲文
    • Organizer
      2023 Winter-II NRF-JSPS Workshop in particle physics, cosmology, and gravitation
    • Int'l Joint Research
  • [Presentation] Simulation of non-spherical PBH formation with mesh-refinenment2023

    • Author(s)
      柳哲文
    • Organizer
      Dynamics of primordial black hole formation
    • Int'l Joint Research / Invited
  • [Presentation] Numerical simulation of primordial black hole formation2023

    • Author(s)
      柳哲文
    • Organizer
      68TH WORKSHOP ON GRAVITATIONAL WAVES AND NUMERICAL RELATIVITY
    • Int'l Joint Research / Invited
  • [Presentation] 定常な質量降着のあるブラックホール時空中の天体の運動について2023

    • Author(s)
      柳哲文
    • Organizer
      日本物理学会 2023年春季大会
  • [Presentation] Simulation of PBH formation from iso-curvature perturbations2022

    • Author(s)
      柳哲文
    • Organizer
      2022 NRF-JSPS Workshop in particle physics, cosmology
    • Int'l Joint Research
  • [Presentation] Simulation of PBH formation from isocurvature perturbations2022

    • Author(s)
      柳哲文
    • Organizer
      日本物理学会(春)
  • [Presentation] The basics of primordial black hole formation and its application2022

    • Author(s)
      柳哲文
    • Organizer
      Asia-Pacific School and Workshop on Gravitation and Cosmology 202
    • Int'l Joint Research / Invited
  • [Presentation] うまくいかない宇宙ひも研究~石原さんの研究に魅せられて~2022

    • Author(s)
      柳哲文
    • Organizer
      相対論と重力研究の現在,過去・未来
    • Invited
  • [Presentation] Threshold of Primordial Black Hole Formation against Velocity Dispersion in Matter-Dominated Era2022

    • Author(s)
      柳哲文
    • Organizer
      2022 Summer NRF-JSPS Workshop in particle physics, cosmology, and gravitation
    • Int'l Joint Research
  • [Presentation] The basics of primordial black hole formation and its application2022

    • Author(s)
      柳哲文
    • Organizer
      The 34th Regular Meeting of the New Higgs Working Group online
    • Int'l Joint Research / Invited
  • [Presentation] 物質優勢期の原始ブラックホール形成における速度分散の影響について2022

    • Author(s)
      柳哲文
    • Organizer
      日本物理学会(秋)
  • [Presentation] Threshold of Primordial Black Hole Formation against Velocity Dispersion in Matter-Dominated Era2022

    • Author(s)
      柳哲文
    • Organizer
      The 31st Workshop on General Relativity and Gravitation in Japan
    • Int'l Joint Research
  • [Presentation] Simulation of primordial black hole formation2022

    • Author(s)
      柳哲文
    • Organizer
      The 4th Workshop on Multi-Messenger Astrophysics and Gravitation (MMAG)
    • Int'l Joint Research / Invited
  • [Presentation] 格子細分化法を用いた非球対称PBH形成シミュレーション2022

    • Author(s)
      柳哲文
    • Organizer
      第23回特異点研究会
  • [Presentation] Axion cloud decay due to the axion-photon conversion with background magnetic fields2021

    • Author(s)
      柳哲文
    • Organizer
      日本物理学会(秋)
  • [Presentation] Simulation of PBH formation from iso-curvature perturbations2021

    • Author(s)
      柳哲文
    • Organizer
      The 30th Workshop on General Relativity and Gravitaion in JAPAN
  • [Presentation] 多重極磁場中でのアクシオン光子転換に伴うアクシオン雲の崩壊率の計算2021

    • Author(s)
      柳哲文
    • Organizer
      第22回 特異点研究会

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Published: 2023-12-25  

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