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Formation of Primordial Black Holes in the Matter-Dominated Era of the Universe

Research Project

Project/Area Number 26400282
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 InstitutionRikkyo University

Principal Investigator

HARADA Tomohiro  立教大学, 理学部, 教授 (60402773)

Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords原始ブラックホール / 初期宇宙 / 一般相対論 / インフレーション理論 / ブラックホール / 重力崩壊 / 膨張宇宙 / インフレーション宇宙論 / 宇宙論的揺らぎ / 原始密度ゆらぎ
Outline of Final Research Achievements

In the formation of primordial black holes in the matter-dominated era of the Universe, it is nonspherical effects that play most important roles. The main results of this project are the following: (1) We have constructed the model of nonspherical formation of primordial black hole with pressure-free fluid using the exact spacetime solution of the Einstein equation. (2) We have estimated the production probability of primordial black holes in the matter-dominated era under the suppression due to anisotropy in gravitational collapse. (3) We have estimated the production probability of primordial black holes in the matter-dominated era and the spin distribution of formed primordial black holes under the suppression due to anisotropy and angular momentum in gravitational collapse. With these results, we can now discuss primordial black holes formed in the matter-dominated era qualitatively with more accruracy and more reliability.

Report

(5 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (50 results)

All 2018 2017 2016 2015 2014 Other

All Journal Article (22 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 22 results,  Open Access: 3 results,  Acknowledgement Compliant: 12 results) Presentation (26 results) (of which Int'l Joint Research: 9 results,  Invited: 6 results) Remarks (2 results)

  • [Journal Article] Energy emission from high curvature region and its backreation2018

    • Author(s)
      Kokubu Takafumi, Jhingan Sanjay, Harada Tomohiro
    • Journal Title

      Physical Review D

      Volume: -

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Complete conformal classification of the Friedmann-Lematre-Robertson-Walker solutions with a linear equation of state2018

    • Author(s)
      Harada Tomohiro、Carr B J、Igata Takahisa
    • Journal Title

      Classical and Quantum Gravity

      Volume: 35 Issue: 10 Pages: 105011-105011

    • DOI

      10.1088/1361-6382/aab99f

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On the stability of a superspinar2018

    • Author(s)
      Nen-ichi Nakao, Pankaj S. Joshi, Jun-Qi Guo, Prashant Kocherlakota, Hideyuki Tagoshi, Tomohiro Harada, Mandar Patil, Andrzej Krolak
    • Journal Title

      Physics Letter B

      Volume: 780 Pages: 410-413

    • DOI

      10.1016/j.physletb.2018.03.014

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spins of primordial black holes formed in the matter-dominated phase of the Universe2017

    • Author(s)
      Tomohiro Harada, Chul-Moon Yoo, Kazunori Kohri, Ken-ichi Nakao
    • Journal Title

      Physical Review D

      Volume: 96 Issue: 8 Pages: 083517-083517

    • DOI

      10.1103/physrevd.96.083517

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Escape probability of the super-Penrose process2017

    • Author(s)
      Kota Ogasawara, Tomohiro Harada, Umpei Miyamoto, Takahisa Igata, Mandar Patil
    • Journal Title

      Physical Review D

      Volume: 95 (2017) no.12, 124019 Issue: 12 Pages: 1-4

    • DOI

      10.1103/physrevd.95.124019

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 3D Simulation of Spindle Gravitational Collapse of a Collisionless Particle System2017

    • Author(s)
      Chul-Moon Yoo, Tomohiro Harada, Hirotada Okawa
    • Journal Title

      Classical an Quantum Gravity

      Volume: 34 Issue: 10 Pages: 105010-105010

    • DOI

      10.1088/1361-6382/aa6ad5

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Light curves of light rays passing through a wormhole2017

    • Author(s)
      Naoki Tsukamoto, Tomohiro Harada
    • Journal Title

      Phys.Rev.

      Volume: D95 Issue: 2

    • DOI

      10.1103/physrevd.95.024030

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Primordial black hole formation in the matter-dominated phase of the Universe2016

    • Author(s)
      T.~Harada, C.~M.~Yoo, K.~Kohri, K.~i.~Nakao and S.~Jhingan
    • Journal Title

      Astrophysical Journal

      Volume: 833 Issue: 1 Pages: 61-61

    • DOI

      10.3847/1538-4357/833/1/61

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Self-similar motion of a Nambu-Goto string2016

    • Author(s)
      Takahisa Igata, Tsuyoshi Houri, Tomohiro Harada
    • Journal Title

      Physical Review D

      Volume: 94 Issue: 6 Pages: 064029-064029

    • DOI

      10.1103/physrevd.94.064029

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Spherical and nonspherical models of primordial black hole formation: exact solutions2016

    • Author(s)
      Tomohiro Harada and Sanjay Jhingan
    • Journal Title

      Prog.Theor.Exp.Phys.

      Volume: 2016 Issue: 9 Pages: 093E04-093E04

    • DOI

      10.1093/ptep/ptw123

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Correspondence between sonic points of ideal photon gas accretion and photon spheres2016

    • Author(s)
      Yasutaka Koga and Tomohiro Harada
    • Journal Title

      Phys. Rev.

      Volume: D94 Issue: 4

    • DOI

      10.1103/physrevd.94.044053

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Consistent analytic approach to the efficiency of collisional Penrose process2016

    • Author(s)
      Tomohiro Harada, Kota Ogasawara, Umpei Miyamoto
    • Journal Title

      Physical Review D

      Volume: 94 Issue: 2 Pages: 1-8

    • DOI

      10.1103/physrevd.94.024038

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Vacuum excitation by sudden appearance and disappearance of a Dirichlet wall in a cavity2016

    • Author(s)
      Tomohiro Harada, Shunichiro Kinoshita, Umpei Miyamoto
    • Journal Title

      Physical Review D

      Volume: 94 Issue: 2 Pages: 1-17

    • DOI

      10.1103/physrevd.94.025006

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Infinite efficiency of the collisional Penrose process2016

    • Author(s)
      Mandar Patil, Tomohiro Harada, Ken-ichi Nakao, Pankaj S. Joshi, Masashi Kimura
    • Journal Title

      Physical Review D

      Volume: 93 Issue: 10

    • DOI

      10.1103/physrevd.93.104015

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High efficiency of collisional Penrose process requires heavy particle production2016

    • Author(s)
      K. Ogasawara, T. Harada, and U. Miyamoto
    • Journal Title

      Physical Review D

      Volume: 93 Issue: 4 Pages: 044054-044054

    • DOI

      10.1103/physrevd.93.044054

    • Related Report
      2015 Research-status Report
    • Peer Reviewed
  • [Journal Article] Does the Gauss- Bonnet term stabilize wormholes?2015

    • Author(s)
      Takafumi Kokubu, Hideki Maeda and Tomohiro Harada
    • Journal Title

      Class. Quant. Grav.

      Volume: 32 Issue: 23 Pages: 235021-235021

    • DOI

      10.1088/0264-9381/32/23/235021

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Negative tension branes as sta- ble thin shell wormholes2015

    • Author(s)
      Takafumi Kokubu and Tomohiro Harada
    • Journal Title

      Class. Quant. Grav.

      Volume: 32 Issue: 20 Pages: 205001-205001

    • DOI

      10.1088/0264-9381/32/20/205001

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Timescale for trans-Planckian collision in Kerr spacetime2015

    • Author(s)
      Mandar Patil, Pankaj S. Joshi, Ken-ichi Nakao, Masashi Kimura, Tomohiro Harada
    • Journal Title

      Europhysics Letters

      Volume: 110 Issue: 3 Pages: 30004-30004

    • DOI

      10.1209/0295-5075/110/30004

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cosmological long-wavelength solutions and primordial black hole formation2015

    • Author(s)
      Tomohiro Harada, Chul-Moon Yoo, Tomohiro Nakama and Yasutaka Koga
    • Journal Title

      Phys. Rev. D

      Volume: 91(8) Issue: 8 Pages: 1-25

    • DOI

      10.1103/physrevd.91.084057

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] The separate universe problem: 40 years on2015

    • Author(s)
      B. J. Carr and Tomohiro Harada
    • Journal Title

      Phys. Rev. D

      Volume: 91(8) Issue: 8

    • DOI

      10.1103/physrevd.91.084048

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] How small can an over-spinning body in general relativity?2014

    • Author(s)
      Ken-ichi Nakao, Masashi Kimura, Tomohiro Harada, Mandar Patil, Pankaj S. Joshi
    • Journal Title

      Physical Review D

      Volume: 90 Issue: 12 Pages: 124079-124079

    • DOI

      10.1103/physrevd.90.124079

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Black holes as particle accelerators: a brief review2014

    • Author(s)
      Tomohiro Harada and Masashi Kimura
    • Journal Title

      Class. Quant. Grav.

      Volume: 31 Issue: 24 Pages: 243001-243001

    • DOI

      10.1088/0264-9381/31/24/243001

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Primordial black holes formed in the matter-dominated era2018

    • Author(s)
      Tomohiro Harada
    • Organizer
      International Workshop "Gravity and Cosmology 2018"
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FLRW解の共形構造の完全分類:線形状態方程式の場合2018

    • Author(s)
      原田知広、Bernard J. Carr、伊形尚久
    • Organizer
      日本物理学会2018年年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 原始ブラックホールについて2018

    • Author(s)
      原田知広
    • Organizer
      ブラックホール磁気圏研究会2018
    • Related Report
      2017 Annual Research Report
  • [Presentation] Spins of primordial black holes formed in the matter-dominated era2017

    • Author(s)
      Tomohiro Harada
    • Organizer
      International Symposium on Cosmology and Particle Astrophysics "CosPA 2017"
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spins of primordial black holes formed in the matter-dominated era2017

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 27th Workshop on General Relativity and Gravitation in Japan
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Formation of primordial black holes from primordial fluctuations2017

    • Author(s)
      Tomohiro Harada
    • Organizer
      Focus Week on Primordial Black Holes
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spins of primordial black holes formed in the matter-dominated phase of the Universe2017

    • Author(s)
      Tomohiro Harada
    • Organizer
      Workshop on "Gravitational Dynamics and Black Holes"
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 物質優勢期における原始ブラックホール形成2017

    • Author(s)
      原田知広、柳哲文 、郡和範、中尾憲一、Sanjay Jhingan
    • Organizer
      日本物理学会2017年年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] FLRW解について2017

    • Author(s)
      原田知広
    • Organizer
      第19回特異点研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 原始ブラックホールの形成2017

    • Author(s)
      原田知広
    • Organizer
      第30回理論懇シンポジウム
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 物質優勢期における原始ブラックホール形成2017

    • Author(s)
      原田知広、柳哲文、郡和範、 中尾憲一、Sanjay Jhingan
    • Organizer
      日本物理学会2017年年次大会
    • Place of Presentation
      大阪大学(大阪府豊中市)
    • Related Report
      2016 Research-status Report
  • [Presentation] 原始ブラックホール形成と箍予想2016

    • Author(s)
      原田知広
    • Organizer
      第18回特異点研究会
    • Place of Presentation
      立教大学(東京都豊島区)
    • Year and Date
      2016-12-27
    • Related Report
      2016 Research-status Report
  • [Presentation] Primordial black hole formation in a matter-dominated universe2016

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 26th Workshop on General Relativity and Gravitation in Japan
    • Place of Presentation
      大阪市立大学(大阪府大阪市)
    • Year and Date
      2016-10-24
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Correspondence between sonic points of ideal photon gas accretion and photon spheres2016

    • Author(s)
      Tomohiro Harada
    • Organizer
      the 21st International Meeting on General Relativity and Gravitation
    • Place of Presentation
      Columbia University (アメリカ合州国ニューヨーク市)
    • Year and Date
      2016-07-10
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 原始ブラックホールの非球対称形成モデル:厳密解2016

    • Author(s)
      原田知広、Sanjay Jhingan
    • Organizer
      日本物理学会2016年年次大会
    • Place of Presentation
      東北学院大学(宮城県仙台市)
    • Year and Date
      2016-03-19
    • Related Report
      2015 Research-status Report
  • [Presentation] ブラックホール周辺:衝突Penrose過程・光子球/音速点対応2016

    • Author(s)
      原田知広
    • Organizer
      ブラックホール磁気圏研究会
    • Place of Presentation
      ホテルマウントレースイ(北海道夕張市)
    • Year and Date
      2016-03-02
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] PBHの非球対称形成モデル2016

    • Author(s)
      原田知広
    • Organizer
      第17回特異点研究会「特異点と時空、および関連する物理」
    • Place of Presentation
      慶應義塾大学(神奈川県横浜市)
    • Year and Date
      2016-01-09
    • Related Report
      2015 Research-status Report
  • [Presentation] Can an over-spinning Kerr geometry be the source of ultra-high energy cosmic rays and neutrinos?2016

    • Author(s)
      原田知広
    • Organizer
      第17回特異点研究会「特異点と時空、および関連する物理」
    • Place of Presentation
      慶應義塾大学(神奈川県横浜市)
    • Year and Date
      2016-01-09
    • Related Report
      2015 Research-status Report
  • [Presentation] 楕円体の重力崩壊のブラックホール形成条件2016

    • Author(s)
      原田知広、Sanjay Jhingan、郡 和範、中尾憲一、柳哲文
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      宮崎大学(宮崎県宮崎市)
    • Related Report
      2016 Research-status Report
  • [Presentation] Szekeres解の宇宙物理学への応用2015

    • Author(s)
      原田知広、Sanjay Jhingan
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      大阪市立大学(大阪府大阪市)
    • Year and Date
      2015-09-25
    • Related Report
      2015 Research-status Report
  • [Presentation] Primordial black hole formation from cosmological fluctuations2015

    • Author(s)
      Tomohiro Harada
    • Organizer
      Hot Topics in General Relativity and Gravitation 2
    • Place of Presentation
      Quy Nhon, Vietnam
    • Year and Date
      2015-08-09
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] High energy particle collision and collisional Penrose process near a Kerr black hole2015

    • Author(s)
      Tomohiro Harada
    • Organizer
      One Hundred Years of Strong Gravity
    • Place of Presentation
      Instituto Superior Tecnico in Lisbon, Lisbon, Portugal
    • Year and Date
      2015-06-10
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 宇宙論的非線形ゆらぎと原始ブラックホール形成2015

    • Author(s)
      原田知広(立教大)、柳哲文(名大)、中間智弘(東大)、古賀恭敬(立教大)
    • Organizer
      日本物理学会2015年年次大会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2015-03-24
    • Related Report
      2014 Research-status Report
  • [Presentation] Black holes as particle accelerators: a brief review2014

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 24th Workshop on General Relativity and Gravitation in Japan
    • Place of Presentation
      東京大学Kavli IPMU(千葉県柏市)
    • Year and Date
      2014-11-10 – 2014-11-14
    • Related Report
      2014 Research-status Report
  • [Presentation] 漸近的準一様解について2014

    • Author(s)
      原田知広(立教大)、柳哲文(名大)
    • Organizer
      日本物理学会2014年秋季大会
    • Place of Presentation
      佐賀大学(佐賀県佐賀市)
    • Year and Date
      2014-09-21
    • Related Report
      2014 Research-status Report
  • [Presentation] Threshold of primordial black hole formation2014

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 15th Canadian Conference on General Relativity and Relativistic Astrophysics
    • Place of Presentation
      ウィニペグ(カナダ)
    • Year and Date
      2014-05-21 – 2014-05-23
    • Related Report
      2014 Research-status Report
  • [Remarks] 原始ブラックホールについて

    • URL

      http://www2.rikkyo.ac.jp/web/harada/pbh_kaken/index.html

    • Related Report
      2016 Research-status Report 2015 Research-status Report
  • [Remarks] 原始ブラックホールについて

    • URL

      http://www2.rikkyo.ac.jp/web/harada/kaken_pbh/index.html

    • Related Report
      2014 Research-status Report

URL: 

Published: 2014-04-04   Modified: 2019-03-29  

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