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Gravitational collapse and spacetime singularities in quantum gravity

Research Project

Project/Area Number 21740190
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionRikkyo University

Principal Investigator

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

Project Period (FY) 2009 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords相対論 / 重力理論 / 時空特異点 / 量子重力 / 一般相対論 / 量子宇宙論
Research Abstract

We have revealed the relationship between quantisation ambiguities in quantum cosmology and the absence of spacetime singularity, deduced the astrophysical observational implications of superextremal Kerr spacetimes and wormhole structures, both of which may be possible under significant quantum gravity effects, and indicated the possibility of particle collision near the horizon of near-extremal rotating black holes of which the centre-of-mass energy might reach the Planck scale.

Report

(5 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (96 results)

All 2013 2012 2011 2010 2009 Other

All Journal Article (57 results) (of which Peer Reviewed: 53 results) Presentation (35 results) Remarks (4 results)

  • [Journal Article] Renormalization groupapproach to Einstein-Rosen waves2013

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

      Phys. Rev. D

      Volume: 87(6) Pages: 7-7

    • URL

      http://dx.doi.org/10.1103/PhysRevD.87.064043

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] ブラックホールは天然の粒子加速器になるか2013

    • Author(s)
      原田知広、木村匡志
    • Journal Title

      日本物理学

      Volume: 第68巻第2号 Pages: 102-102

    • Related Report
      2012 Final Research Report
  • [Journal Article] Signed magnification sums for general spherical lenses2013

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

      Phys. Rev. D

      Volume: 87(2) Pages: 6-6

    • URL

      http://dx.doi.org/10.1103/PhysRevD.87.024024

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Signed magnification sums for general spherical lenses2013

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

      Phys. Rev.

      Volume: D87 Issue: 2 Pages: 24024-24024

    • DOI

      10.1103/physrevd.87.024024

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Renormalization group approach to Einstein-Rosen waves2013

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

      Phys. Rev.

      Volume: D87 Issue: 6 Pages: 64043-64043

    • DOI

      10.1103/physrevd.87.064043

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Wave Effect in Gravitational Lensing by the Ellis Wormhole2013

    • Author(s)
      Chul-Moon Yoo, Tomohiro Harada, Naoki Tsukamoto
    • Journal Title

      Phys. Rev.

      Volume: 未定

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Weak cosmic censorship in gravitational collapse with astrophysical parameter values2013

    • Author(s)
      Umpei Miyamoto, Sanjay Jhingan, Tomohiro Harada
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 未定

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Can we distinguish between black holes and wormholes by their Einstein ring systems2012

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

      Phys. Rev. D

      Volume: 86(10) Pages: 6-6

    • URL

      http://dx.doi.org/10.1103/PhysRevD.86.104062

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Upperlimits of particle emission from high-energy collision and reaction near a maximally rotating Kerr black hole2012

    • Author(s)
      Tomohiro Harada, Hiroya Nemoto and Umpei Miyamoto
    • Journal Title

      Phys. Rev. D

      Volume: 86(2) Pages: 1-1

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Effect of a weak electromagnetic field on particle acceleration by a rotating black hole2012

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

      Phys. Rev. D

      Volume: 85(10) Pages: 11-11

    • URL

      http://dx.doi.org/10.1103/PhysRevD.85.104028

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Effect of a Weak Electromagnetic Field on Particle Acceleration by a Rotating Black Hole2012

    • Author(s)
      T. Igata, T. Harada, M. Kimura
    • Journal Title

      Physical Review D

      Volume: 85 Issue: 10 Pages: 104028-104028

    • DOI

      10.1103/physrevd.85.104028

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Upper limits of particle emission from high-energy collision and reaction near a maximally rotating Kerr black hole2012

    • Author(s)
      Tomohiro Harada, Hiroya Nemoto and Umpei Miyamoto
    • Journal Title

      Phys. Rev.

      Volume: D86 Issue: 2 Pages: 024027-069902

    • DOI

      10.1103/physrevd.86.024027

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Can we distinguish between black holes and wormholes by their Einstein ring systems?2012

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

      Phys. Rev.

      Volume: D86 Issue: 10 Pages: 104062-104062

    • DOI

      10.1103/physrevd.86.104062

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Collision of an object in the transition from adiabatic inspiral to plunge around a Kerr black hole2011

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

      Phys. Rev. D

      Volume: 84(12) Pages: 8-8

    • URL

      http://dx.doi.org/10.1103/PhysRevD.84.124032

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Uniqueness of static spherically symmetric vacuum solutions in the IR limit of nonrelativistic quantum gravity2011

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

      J. Phys.: Conf. Ser

      Volume: 314

    • URL

      http://dx.doi.org/10.1088/1742-6596/314/1/012120

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Discretisation parameter and operator ordering in loop quantum cosmology with the cosmological constant2011

    • Author(s)
      Tomo Tanaka, Fumitoshi Amemiya, Masahiro Shimano, Tomohiro Harada and Takashi Tamaki
    • Journal Title

      Phys. Rev. D

      Volume: 83(10) Pages: 14-14

    • URL

      http://dx.doi.org/10.1103/PhysRevD.83.104049

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] The Japanese space gravitational wave antenna: DECIGO2011

    • Author(s)
      Seiji Kawamura et al. (31th among 145 authors
    • Journal Title

      Class. Quantum Grav

      Volume: 28(9) Pages: 12-12

    • URL

      http://dx.doi.org/10.1088/0264-9381/28/9/094011

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Collision of two general geodesic particles around a Kerr black hole2011

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

      Phys. Rev. D

      Volume: 83(8) Pages: 9-9

    • URL

      http://dx.doi.org/10.1103/PhysRevD.83.084041

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Collision of an innermost stable circular orbit particle around a Kerr black hole2011

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

      Phys. Rev. D

      Volume: 83(2) Pages: 11-11

    • URL

      http://dx.doi.org/10.1103/PhysRevD.83.024002

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Uniqueness of static spherically symmetric vacuum solutions in the IR limit of Horava-Lifshitz gravity2011

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

      Int. J.Mod. Phys.D

      Volume: 20(1) Pages: 111-118

    • URL

      http://dx.doi.org/10.1142/S021827181101865

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Observational Testability of Kerr bound in X-ray Spectrum of Black-Hole Candidates2011

    • Author(s)
      Rohta Takahashi and Tomohiro Harada
    • Journal Title

      Class. Quant. Grav.

      Volume: 27(7) Pages: 21-21

    • URL

      http://dx.doi.org/10.1088/0264-9381/27/7/075003

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Collision of two general geodesic particles around a Kerr black hole2011

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

      Phys.Rev.D

      Volume: 83 Issue: 8

    • DOI

      10.1103/physrevd.83.084041

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Japanese space gravitational wave antenna : DECIGO2011

    • Author(s)
      S.Kawamura, et al
    • Journal Title

      Classical and Quantum Gravity

      Volume: 28 Issue: 9 Pages: 94011-94011

    • DOI

      10.1088/0264-9381/28/9/094011

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Discretisation parameter and operator ordering in loop quantum cosmology with the cosmological constant2011

    • Author(s)
      Tomo Tanaka, Fumitoshi Amemiya, Masahiro Shimano, Tomohiro Harada, Takashi Tamaki
    • Journal Title

      Phys.Rev.D

      Volume: 83 Issue: 10

    • DOI

      10.1103/physrevd.83.104049

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Collision of an object in the transition from adiabatic inspiral to plunge around a Kerr black hole2011

    • Author(s)
      原田知広, 木村匡志
    • Journal Title

      Physical Review D

      Volume: 84 Issue: 12

    • DOI

      10.1103/physrevd.84.124032

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Uniqueness of static spherically symmetric vacuum solutions in the IR limit of nonrelativistic quantum gravity2011

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

      J.Phys. :Conf.Ser.

      Volume: 314 Pages: 012120-012120

    • DOI

      10.1088/1742-6596/314/1/012120

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Black hole candidates and the Kerr bound2011

    • Author(s)
      Tomohiro Harada, Rohta Takahashi
    • Journal Title

      J.Phys. :Conf.Ser.

      Volume: 314 Pages: 012084-012084

    • DOI

      10.1088/1742-6596/314/1/012084

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Collision of an innermost stable circular orbit particle around a Kerrblack hole2011

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

      Phys.Rev.D

      Volume: 83

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Uniqueness of static spherically symmetric vacuum solutions in the IR limit of Horava-Lifshitz gravity2011

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

      Int.J.Mod.Phys.D

      Volume: 20 Pages: 111-118

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Black hole candidates and the Kerr bound2010

    • Author(s)
      Tomohiro Harada and Rohta Takahashi
    • Journal Title

      J. Phys.: Conf. Ser. (2011), as a contribution to the Proceedings of Spanish Relativity Meeting (ERE 2010): Gravity as a Crossroad in Physics

      Volume: 314 Pages: 6-10

    • URL

      http://dx.doi.org/10.1088/1742-6596/314/1/012084

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Visible borders of spacetime generated by high-energy collisions2010

    • Author(s)
      Ken-ichi Nakao, Tomohiro Harada and Umpei Miyamoto
    • Journal Title

      Phys. Rev. D

      Volume: 82(12) Pages: 4-4

    • URL

      http://dx.doi.org/10.1103/PhysRevD.82.121501

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Can a primordial black hole or wormhole grow as fast as the universe2010

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

      Class. Quant. Grav.

      Volume: 27(18) Pages: 28-28

    • URL

      http://dx.doi.org/10.1088/0264-9381/27/18/183101

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Outflows from accreting super-spinars2010

    • Author(s)
      Cosimo Bambi, Tomohiro Harada, RohtaTakahashi and Naoki Yoshida
    • Journal Title

      Phys. Rev. D

      Volume: 81(10) Pages: 12-12

    • URL

      http://dx.doi.org/10.1103/PhysRevD.81.104004

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] DECIGO and DECIGO pathfinder2010

    • Author(s)
      Masaki Ando et al.
    • Journal Title

      Class. Quant. Grav.

      Volume: 27(8) Pages: 10-10

    • URL

      http://dx.doi.org/10.1088/0264-9381/27/8/084010

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Visible borders of spacetime generated by high-energy collisions2010

    • Author(s)
      Ken-ichi Nakao, Tomohiro Harada, Umpei Miyamoto
    • Journal Title

      Phys.Rev.D

      Volume: 82

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Can a primordial black hole or wormhole grow as fast as the universe?2010

    • Author(s)
      B.J.Carr, Tomohiro Harada, Hideki Maeda
    • Journal Title

      Class.Quant.Grav.

      Volume: 27

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Outflows from accreting super-spinars2010

    • Author(s)
      Cosimo Bambi, Tomohiro Harada, Rohta Takahashi, Naoki Yoshida
    • Journal Title

      Phys.Rev.D

      Volume: 81

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] DECIGO and DECIGO pathfinder2010

    • Author(s)
      Masaki Ando, et al. (28th among 140 authors)
    • Journal Title

      Class.Quant.Grav.

      Volume: 27

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observational Testability of Kerr bound in X-ray Spectrum of Black-Hole Candidates2010

    • Author(s)
      Rohta Takahashi, Tomohiro Harada
    • Journal Title

      Class.Quant.Grav. 27

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Accretion process onto super-spinning objects2009

    • Author(s)
      Cosimo Bambi, Katherine Freese, Tomohiro Harada, Rohta Takahashi and Naoki Yoshida
    • Journal Title

      Phys. Rev. D

      Volume: 80(10) Pages: 10-10

    • URL

      http://dx.doi.org/10.1103/PhysRevD.80.104023

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Observational constraints on a power spectru from super-inflation in Loop Quantum Cosmology2009

    • Author(s)
      Masahiro Shimano and Tomohiro Harada,''
    • Journal Title

      Phys. Rev. D

      Volume: 80(6) Pages: 17-17

    • URL

      http://dx.doi.org/10.1103/PhysRevD.80.063538

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Relativistic Gravitational Collapse of a Cylindrical Shell of Dust II: SettlingDown Boundary Condition2009

    • Author(s)
      Ken-ichi Nakao, Tomohiro Harada, Yasunari Kurita and Yoshiyuki Morisawa
    • Journal Title

      Prog. Theor. Phys.

      Volume: 122(2) Pages: 521-541

    • URL

      http://dx.doi.org/10.1143/PTP.122.521

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Einstein-Rosen waves and the self-similarity hypothesis in cylindrical symmetry2009

    • Author(s)
      Tomohiro Harada, Ken-ichi Nakao and Brien C. Nolan
    • Journal Title

      Phys. Rev. D

      Volume: 80(2) Pages: 15-15

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Singularities and self-similarity in gravitational collapse'2009

    • Author(s)
      Tomohiro Harada
    • Journal Title

      a plenary talk given at the Hayashibara Forum at IHES on Singularities, 20-23 Nov 2006, Bures-sur-Yvette, France, Advanced Studies in Pure Mathematics

      Volume: 55 Pages: 15-30

    • URL

      http://arxiv.org/abs/arXiv:0904.4770

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Self-similar black holes in an accelerated universe2009

    • Author(s)
      Tomohiro Harada
    • Journal Title

      AIP Conf. Proc. (Physics and Mathematics of Gravitation: the Proceedings of the Spanish Relativity Meeting 2008, 15 - 19 Sep 2008, Salamanca, Spain", ed. K.E. Kunze, M. Mars and M.A. Vazquez-Mozo, (American Insitute of Physics, New York, 2009))

      Volume: 1122 Pages: 288-291

    • URL

      http://dx.doi.org/10.1063/1.3141296

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] DECIGO: The Japanese space gravitational wave antenna2009

    • Author(s)
      Shuichi Sato et al. (31st among 135 authors)
    • Journal Title

      J. Phys. Conf. Ser

      Volume: 154

    • URL

      http://dx.doi.org/10.1088/1742-6596/154/1/012040

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] DECIGO pathfinder2009

    • Author(s)
      Masaki Ando et al. (33rd among 137 authors)
    • Journal Title

      Class. Quantum Grav.

      Volume: 26

    • URL

      http://dx.doi.org/10.1088/0264-9381/26/9/094019

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Accretion process onto super-spinning objects2009

    • Author(s)
      Cosimo Bambi, Katherine Freese, Tomohiro Harada, Rohta Takahashi, Naoki Yoshida
    • Journal Title

      Phys.Rev.D 80

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observational constraints on a power spectrum from super-inflation in Loop Quantum Cosmology2009

    • Author(s)
      Masahiro Shimano, Tomohiro Harada
    • Journal Title

      Phys.Rev.D 80

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Relativistic Gravitational Collapse of a Cylindrical Shell of Dust II : Settling Down Boundary Condition2009

    • Author(s)
      Ken-ichi Nakao, Tomohiro Harada, Yasunari Kurita, Yoshiyuki Morisawa
    • Journal Title

      Prog.Theor.Phys. 122

      Pages: 521-541

    • NAID

      110007339479

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Einstein-Rosen waves and the self-similarity hypothesis in cylindrical symmetry2009

    • Author(s)
      Tomohiro Harada, Ken-ichi Nakao, Brien C.Nolan
    • Journal Title

      Phys.Rev.D 80

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Singularities and self-similarity in gravitational collapse2009

    • Author(s)
      Tomohiro Harada
    • Journal Title

      Advanced Studies in Pure Mathematics 55

      Pages: 15-30

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Self-similar black holes in an accelerated universe2009

    • Author(s)
      Tomohiro Harada
    • Journal Title

      AIP Conf.Proc. 1122

      Pages: 288-291

    • Related Report
      2009 Annual Research Report
  • [Journal Article] DECIGO : The Japanese space gravitational wave antenna2009

    • Author(s)
      Shuichi Sato, et al.(31st among 135 authors)
    • Journal Title

      J.Phys.Conf.Ser. 154

      Pages: 12040-12040

    • Related Report
      2009 Annual Research Report
  • [Journal Article] DECIGO pathfinder2009

    • Author(s)
      Masaki Ando, et al.(31st among 135 authors)
    • Journal Title

      Class.Quant.Grav. 26

      Pages: 94019-94019

    • Related Report
      2009 Annual Research Report
  • [Journal Article] Wave Effect in Gravitational Lensing by the EllisWormhole

    • Author(s)
      Chul-Moon Yoo, Tomohiro Harada and Naoki Tsukamoto
    • Journal Title

      Physical Review D

      Volume: YITP-13-15 RUP-13-3, arXiv:1302.7170

    • URL

      http://dx.doi.org/10.1103/PhysRevD.87.084045

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Weak cosmic censorship in gravitational collapse with astrophysical parameter values

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

      Progress of Theoretical and Experimental Physics

      Volume: (accepted)

    • URL

      http://dx.doi.org/10.1093/ptep/ptt027

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Presentation] 分離宇宙条件の一般化へ向けて2013

    • Author(s)
      原田知広(立教大理・准教授)Bernard J. Carr (ロンドン大クインメアリ校)
    • Organizer
      日本物理学会第68回年次大会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-29
    • Related Report
      2012 Annual Research Report 2012 Final Research Report
  • [Presentation] High-velocity collision of particles around a Kerr black hole and its implication2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      Gravity and Cosmology 2012, 18 Nov-21Dec
    • Place of Presentation
      Kyoto University, Kyoto, Japan.
    • Year and Date
      2012-11-18
    • Related Report
      2012 Final Research Report
  • [Presentation] 高速回転ブラックホール付近の高エネルギー粒子衝突による粒子放射に対する上限について2012

    • Author(s)
      原田知広(立教大理・准教授)、宗像裕也(立教大理D3)、宮本雲平(立教大・先端科学計測センターPD
    • Organizer
      日本物理学会2012年秋季大会
    • Place of Presentation
      京都産業大学
    • Year and Date
      2012-09-12
    • Related Report
      2012 Final Research Report
  • [Presentation] High-velocity collision of two general geodesic particles around a Kerr black hole2012

    • Author(s)
      Tomohiro Harada and Masashi Kimura
    • Organizer
      the 13th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories
    • Place of Presentation
      Stockholm University, Stockholm, Sweden
    • Year and Date
      2012-07-17
    • Related Report
      2012 Final Research Report
  • [Presentation] High-velocity collision of an ISCO particle around a Kerr black hole2012

    • Author(s)
      Tomohiro Harada and Masashi Kimura
    • Organizer
      the 13th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories
    • Place of Presentation
      Stockholm University, Stockholm, Sweden.
    • Year and Date
      2012-07-17
    • Related Report
      2012 Final Research Report
  • [Presentation] 重力波放射反作用を考慮したときの天体加速器としての Kerr ブラックホール2012

    • Author(s)
      原田知広 立教大理・准教授、木村匡志(京大基研・学振特別研究員PD)
    • Organizer
      日本物理学会第67回年次大会
    • Place of Presentation
      関西学院大学
    • Year and Date
      2012-03-27
    • Related Report
      2012 Final Research Report
  • [Presentation] 重力波放射反作用を考慮したときの天体加速器としてのKerrブラックホール2012

    • Author(s)
      原田知広、木村匡志
    • Organizer
      日本物理学会第67回年次大会
    • Place of Presentation
      関西学院大学
    • Year and Date
      2012-03-27
    • Related Report
      2011 Annual Research Report
  • [Presentation] High-velocity collision of particles around a Kerr black hole and its implication2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      Nishinomiya Yukawa Symposium: New Waves in Gravity and Cosmology, 4-6Dec
    • Place of Presentation
      Kyoto University, Kyoto, Japan. (poster and short talk)
    • Related Report
      2012 Final Research Report
  • [Presentation] Upper limits of particle emission from high-energy collisionand reaction near a maximally rotating Kerr black hole2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      the RESCEU SYMPOSIUM ON GENERAL RELATIVITY AND GRAVITATION
    • Place of Presentation
      University of Tokyo, Tokyo, Japan.
    • Related Report
      2012 Final Research Report
  • [Presentation] High-velocity collision of particles around a rapidly rotating black hole2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 7th International Conference onGravitation and Cosmology
    • Place of Presentation
      Holida Inn Goa, Goa, India.
    • Related Report
      2012 Final Research Report
  • [Presentation] High-velocity collision of particles around a rapidly rotating black hole2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      The21st Workshop on General Relativity and Gravitation in Japan
    • Place of Presentation
      Tohoku University, Sendai, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] High-velocity collision of particles around a Kerr black hole and its implication2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      Nishinomiya Yukawa Symposium: New Waves in Gravity and Cosmology
    • Place of Presentation
      Kyoto University
    • Related Report
      2012 Annual Research Report
  • [Presentation] High-velocity collision of particles around a Kerr black hole and its implication2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      Gravity and Cosmology 2012
    • Place of Presentation
      Kyoto University
    • Related Report
      2012 Annual Research Report
  • [Presentation] Upper limits of particle emission from high-energy collisionand reaction near a maximally rotating Kerr black hole2012

    • Author(s)
      Tomohiro Harada
    • Organizer
      RESCEU SYMPOSIUM ON GENERAL RELATIVITY AND GRAVITATION ``JGRG22''
    • Place of Presentation
      University of Tokyo
    • Related Report
      2012 Annual Research Report
  • [Presentation] High-velocity collision of two general geodesic particles around a Kerr black hole2012

    • Author(s)
      Tomohiro Harada and Masashi Kimura
    • Organizer
      13th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories
    • Place of Presentation
      Stockholm University, Sweden
    • Related Report
      2012 Annual Research Report
  • [Presentation] High-velocity collision of an ISCO particle around a Kerr black hole2012

    • Author(s)
      Tomohiro Harada and Masashi Kimura
    • Organizer
      13th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories
    • Place of Presentation
      Stockholm University, Sweden
    • Related Report
      2012 Annual Research Report
  • [Presentation] 高速回転ブラックホール付近の高エ ネルギー粒子衝突による粒子放射に対する上限について2012

    • Author(s)
      原田知広、宗像裕也、宮本雲平
    • Organizer
      日本物理学会2012年秋季大会
    • Place of Presentation
      京都産業大学
    • Related Report
      2012 Annual Research Report
  • [Presentation] Kerrブラックホール周りでの一般の測地的二粒子の衝突2011

    • Author(s)
      原田知広(立教大理・准教授)、木村匡志(京大基研・学振特別研究員 PD)
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      弘前大学
    • Year and Date
      2011-09-16
    • Related Report
      2012 Final Research Report 2011 Annual Research Report
  • [Presentation] 高速回転ブラックホール付近での天体の高速衝突2011

    • Author(s)
      原田知広(立教大理・准教授)、木村匡志(大阪市大数学研究所・専任研究員)
    • Organizer
      日本天文学会2011年春季年会予稿集(東北関東大震災のための年会中止に伴う特例措置)
    • Related Report
      2012 Final Research Report
  • [Presentation] Collision of geodesic particles around a Kerr black hole2011

    • Author(s)
      Tomohiro Harada
    • Organizer
      IPMU Workshop on Black Holes
    • Place of Presentation
      IPMU, Kashiwa, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] High-velocity collision of particles around a rapidly rotating black hole2011

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 7th International Conference on Gravitation and Cosmology
    • Place of Presentation
      Holiday Inn Goa, Goa, India
    • Related Report
      2011 Annual Research Report
  • [Presentation] High-velocity collision of particles around a rapidly rotating black hole2011

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 21st Workshop on General Relativity and Gravitation in Japan
    • Place of Presentation
      Tohoku University, Sendai, Japan
    • Related Report
      2011 Annual Research Report
  • [Presentation] 高速回転ブラックホール付近での天体の高速衝突2011

    • Author(s)
      原田知広、木村匡志
    • Organizer
      日本天文学会春季年会
    • Place of Presentation
      日本天文学会2011年春季年会予稿集(東北関東大台災のための年会中止に伴う特例)
    • Related Report
      2010 Annual Research Report
  • [Presentation] ブラックホール候補天体とKerr限界2010

    • Author(s)
      高橋労太(理研・基礎科学特別研究員)、原田知広(立教大理・准教授)
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      九州工業大学
    • Year and Date
      2010-09-14
    • Related Report
      2012 Final Research Report 2010 Annual Research Report
  • [Presentation] Black hole candidates and the Kerr bound2010

    • Author(s)
      Tomohiro Harada
    • Organizer
      Spanish Relativity Meeting 2010
    • Place of Presentation
      Palacio de Exposiciones yCongresos de Granada, Granada, Spain.
    • Year and Date
      2010-09-09
    • Related Report
      2012 Final Research Report
  • [Presentation] 非相対論的量子重力の赤外極限における静的球対称解2010

    • Author(s)
      原田知広(立教大理・准教授)、宮本雲平(立教大理・ポストドクトラルフェロー)、塚本直樹(立教大理・M2)
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-23
    • Related Report
      2012 Final Research Report
  • [Presentation] Black hole candidates and the Kerr bound2010

    • Author(s)
      Tomohiro Harada
    • Organizer
      The20th Workshop on General Relativity and Gravitation in Japan
    • Place of Presentation
      YITP, Kyoto, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] Uniqueness of static spherically symmetric vacuum solutions in the IR limit of nonrelativistic quantum gravity2010

    • Author(s)
      Tomohiro Harada
    • Organizer
      Spanish Relativity Meeting 2010
    • Place of Presentation
      Palacio de Exposiciones yCongresos de Granada, Granada, Spain
    • Related Report
      2012 Final Research Report
  • [Presentation] Black hole candidates and the Kerr bound2010

    • Author(s)
      Tomohiro Harada
    • Organizer
      Spanish Relativity Meeting 2010
    • Place of Presentation
      Granada, Spain
    • Related Report
      2010 Annual Research Report
  • [Presentation] Uniqueness of static spherically symmetric vacuum solutions in the IR limit of nonrelativistic quantum gravity2010

    • Author(s)
      Tomohiro Harada
    • Organizer
      Spanish Relativity Meeting 2010
    • Place of Presentation
      Granada, Spain
    • Related Report
      2010 Annual Research Report
  • [Presentation] 非相対論的量子重力の赤外極限における静的球対称解2010

    • Author(s)
      原田知広、宮本雲平、塚本直樹
    • Organizer
      日本物理学会
    • Place of Presentation
      岡山大学
    • Related Report
      2009 Annual Research Report
  • [Presentation] Einstein-Rosenwaves and the self-similarity hypothesis in cylindrical symmetry2009

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 19th Workshop on General Relativity and Gravitation in Japan
    • Place of Presentation
      Rikkyo University, Tokyo, Japan
    • Year and Date
      2009-11-30
    • Related Report
      2012 Final Research Report
  • [Presentation] Einstein-Rosen波と円筒対称時空における自己相似仮説II2009

    • Author(s)
      原田知広(立教大理・准教授)、中尾憲一(大阪市立大・教授)、B.C.Nolan(ダブリン市立大・上級講師)
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      甲南大学
    • Year and Date
      2009-09-10
    • Related Report
      2012 Final Research Report 2009 Annual Research Report
  • [Presentation] Einstein-Rosen waves and the self-similarity hypothesis in cylindrical symmetry2009

    • Author(s)
      Tomohiro Harada, Ken-ichi Nakao and Brien C. Nolan
    • Organizer
      The 12th Marcel Grossmann Meeting on recent developments in theoretical and experimental general relativity, gravitation, relativistic field theories
    • Place of Presentation
      Unesco Headquarters, Paris, France
    • Related Report
      2012 Final Research Report 2009 Annual Research Report
  • [Presentation] Einstein-Rosen waves and the self-similarity hypothesis in cylindrical symmetry2009

    • Author(s)
      Tomohiro Harada
    • Organizer
      The 19th Workshop on General Relativity and GraVitation in Japan
    • Place of Presentation
      Rikkyo University
    • Related Report
      2009 Annual Research Report
  • [Remarks]

    • URL

      http://www2.rikkyo.ac.jp/~harada/

    • Related Report
      2012 Final Research Report
  • [Remarks]

    • URL

      http://www2.rikkyo.ac.jp/web/harada/

    • Related Report
      2011 Annual Research Report
  • [Remarks]

    • URL

      http://www2.rikkyo.ac.jp/web/harada/

    • Related Report
      2010 Annual Research Report
  • [Remarks]

    • URL

      http://www2.rikkyo.ac.jp/web/harada/

    • Related Report
      2009 Annual Research Report

URL: 

Published: 2009-04-01   Modified: 2019-07-29  

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