Study of the accretion flow onto super-spinars

• Project/Area Number: 22740147
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: BAMBI Cosimo 東京大学, 数物連携宇宙研究機構, 特任研究員 (30534995)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 相対論 / 重力(理論)

Research Abstract

The final product of the gravitational collapse is thought to be a black hole and astronomers have discovered several good astrophysical candidates. In order to confirm this conjecture, we need to probe the geometry of the space-time around these objects and check it is consistent with the predictions of General Relativity. My project has studied how present and near-future sub-millimeter and X-ray data can test the actual nature of the current astrophysical black hole candidates.

Research Products

• [Journal Article] Can an astrophysical black hole have a topologically non-trivial event horizon? (2011)
  • Author(s): Bambi, Cosimo、Modesto, Leonardo
  • Journal Title: Physics Letters B Volume: Volume : 706 Issue : 1 Issue: 1 Pages: 13-18
  • DOI: 10.1016/j.physletb.2011.10.059
• [Journal Article] Can we constrain the maximum value for the spin parameter of the super-massive objects in galactic nuclei without knowing their actual nature? (2011)
  • Author(s): Bambi, Cosimo
  • Journal Title: Physics Letters B Volume: Volume : 705 Issue : 1-2 Issue: 1-2 Pages: 5-8
  • DOI: 10.1016/j.physletb.2011.10.005
• [Journal Article] CONSTRAINING THE QUADRUPOLE MOMENT OF STELLAR-MASS BLACK HOLE CANDIDATES WITH THE CONTINUUM FITTING METHOD (2011)
  • Author(s): Bambi, Cosimo、Barausse, E
  • Journal Title: Astrophysical Journal Volume: Volume : 731 Issue : 2 Issue: 2 Pages: 121-121
  • DOI: 10.1088/0004-637x/731/2/121
• [Journal Article] Constraint on the quadrupole moment of super-massive black hole candidates from the estimate of the mean radiative efficiency of AGN (2011)
  • Author(s): Bambi, Cosimo
  • Journal Title: Physical Review D Volume: Volume : 83 Issue : 10 Issue: 10 Pages: 103003-103003
  • DOI: 10.1103/physrevd.83.103003
• [Journal Article] Evolution of thespin parameter of accreting compact objects with non-Kerr quadrupole moment (2011)
  • Author(s): Bambi, Cosimo
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 5 Issue: 05 Pages: 9-9
  • DOI: 10.1088/1475-7516/2011/05/009
  • Peer Reviewed
• [Journal Article] Final stages of accretion onto non-Kerr compact objects (2011)
  • Author(s): Bambi, Cosimo、Barausse, Enrico
  • Journal Title: Physical Review D Volume: Volume : 84 Issue : 8 Issue: 8 Pages: 84034-84034
  • DOI: 10.1103/physrevd.84.084034
  • Peer Reviewed
• [Journal Article] Spinning super-massive objects in galactic nuclei up to a(*)> 1 (2011)
  • Author(s): Bambi, Cosimo
  • Journal Title: Epl Volume: Volume : 94 Issue : 5 Issue: 5 Pages: 50002-50002
  • DOI: 10.1209/0295-5075/94/50002
  • Peer Reviewed
• [Journal Article] Violation of the Carter-Israel conjecture and its astrophysical implications (2011)
  • Author(s): Cosimo Bambi
  • Journal Title: Journal of Physics : Conference Series, 012005 Volume: Vol.283 Pages: 1-8
• [Journal Article] Out flows from accreting super-spinars (2010)
  • Author(s): Bambi, Cosimo、Harada, T, Takahashi, R ; et al
  • Journal Title: Physical Review Volume: Volume : 81 Issue : 10 Issue: 10 Pages: 104004-104004
  • DOI: 10.1103/physrevd.81.104004
• [Journal Article] Shape and position of the shadow in the delta=2 Tomimatsu-Sato spacetime (2010)
  • Author(s): Bambi, Cosimo、Yoshida, N
  • Journal Title: Classical and Quantum Gravity Volume: Volume : 27 Issue : 20 Issue: 20 Pages: 205006-205006
  • DOI: 10.1088/0264-9381/27/20/205006
• [Journal Article] Thick disk accretion in Kerr space-time with arbitrary spin parameters (2010)
  • Author(s): Bambi, Cosimo、Yoshida, N
  • Journal Title: Physical Review D Volume: Volume : 82 Issue : 12 Issue: 12 Pages: 124037-124037
  • DOI: 10.1103/physrevd.82.124037
• [Journal Article] Three-dimensional simulations of the accretion process in Kerr space-time with arbitrary value of the spin parameter (2010)
  • Author(s): Bambi, Cosimo、Yoshida, N
  • Journal Title: Physical Review D Volume: Volume : 82 Issue : 6 Issue: 6 Pages: 64002-64002
  • DOI: 10.1103/physrevd.82.064002
• [Journal Article] Thick disk accretion in Kerr space-time with arbitrary spin parameters (2010)
  • Author(s): Cosimo Bambi, Naoki Yoshida
  • Journal Title: Physical Review D, 124037 Volume: Vol.82 Pages: 1-8
  • Peer Reviewed
• [Journal Article] Shape and position of the shadow in the δ=2 Tomimatsu-Sato space-time (2010)
  • Author(s): Cosimo Bambi, Naoki Yoshida
  • Journal Title: Classical and Quantum Gravity, 205006 Volume: Vol.27 Pages: 1-10
  • Peer Reviewed
• [Journal Article] 3D simulations of the accretion process in Kerr space-time with arbitrary value of the spin parameter (2010)
  • Author(s): Cosimo Bambi, Naoki Yoshida
  • Journal Title: Physical Review D, 064002 Volume: Vol.82 Pages: 1-13
  • Peer Reviewed
• [Journal Article] Outflows from accreting super-spinars (2010)
  • Author(s): Cosimo Bambi, Tomohiro Harada, Rohta Takahashi, Naoki Yoshida
  • Journal Title: Physical Review D, 104004 Volume: Vol.81 Pages: 1-12
  • Peer Reviewed
• [Presentation] Testing the Kerr black hole paradigm with electromagnetic radiation、Stellar and Intermediate Mass Black Holes (2011)
  • Author(s): Bambi Cosimo
  • Organizer: Gravitational Physics and Radiation Sources Across the Universe
  • Place of Presentation: Aspen
  • Year and Date: 2011-06-15
• [Presentation] Compact objects with spin parameter$ a_*> 1$ (2011)
  • Author(s): Bambi Cosimo
  • Organizer: 46th Rencontres de Moriond-Gravitation Session
  • Place of Presentation: La Thuile
  • Year and Date: 2011-03-26
• [Presentation] Compact objects with spin parameter a>1 (2011)
  • Author(s): Cosimo Bambi
  • Organizer: 46th Rencontres de Moriond-Gravitation Session
  • Place of Presentation: La Thuile, Aosta, Italy
• [Presentation] Probing the space-time around astrophysical black hole candidates with future VBLI experiments (2010)
  • Author(s): Bambi Cosimo
  • Organizer: Summer Institute 2010(Cosmology & Strings)
  • Place of Presentation: Fuji-yoshida
  • Year and Date: 2010-08-11
• [Presentation] Searching for quantum gravity effects in astrophysical black hole candidates (2010)
  • Author(s): Bambi Cosimo
  • Organizer: Experimental Searchfor Quantum Gravity
  • Place of Presentation: Stockholm
  • Year and Date: 2010-07-13
• [Presentation] Violation of the Carter-Israel conjecture and its astrophysical implications (2010)
  • Author(s): Bambi Cosimo
  • Organizer: 19th International Conference on General Relativity and Gravitation
  • Place of Presentation: MexicoCity
  • Year and Date: 2010-07-07
• [Presentation] Violation of the Carter-Israel conjecture and its astrophysical implications、NEB14 (2010)
  • Author(s): Bambi Cosimo
  • Organizer: Recent Developments in Gravity
  • Place of Presentation: Ioannina
  • Year and Date: 2010-06-10
• [Presentation] Probing the space-time around astrophysical black hole candidates with future VBLI experiments (2010)
  • Author(s): Cosimo Bambi
  • Organizer: Summer Institute 2010-Cosmology & Strings
  • Place of Presentation: 富士Calm(山梨県富士吉田市)
• [Presentation] Searching for quantum gravity effects in astrophysical black hole candidates (2010)
  • Author(s): Cosimo Bambi
  • Organizer: Experimental Search for Quantum Gravity
  • Place of Presentation: Stockholm, Sweden
• [Presentation] Violation of the Carter-Israel conjecture and its astrophysical implications (2010)
  • Author(s): Cosimo Bambi
  • Organizer: 19th International Conference on General Relativity and Gravitation
  • Place of Presentation: Mexico City, Mexico
• [Presentation] Violation of the Carter-Israel conjecture and its astrophysical implications (2010)
  • Author(s): Cosimo Bambi
  • Organizer: NEB 14 : Recent Developments in Gravity
  • Place of Presentation: Ioannina, Greece