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The Mass Distribution of Stellar-Mass Black Holes
Mass Distribution Stellar-Mass Black Holes
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2010/11/11
We perform a Bayesian analysis of the mass distribution of stellar-mass black holes using the observed masses of 15 low-mass X-ray binary systems undergoing Roche lobe overflow and five high-mass, win...
Accretion Disks Around Binary Black Holes: A Quasistationary Model
ProAccretion Disks Binary Black Holes Quasistationary Model
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2010/11/9
Tidal torques acting on a gaseous accretion disk around a binary black hole can create a gap in the disk near the orbital radius. At late times, when the binary inspiral timescale due to gravitational...
Retrograde Accretion and Merging Supermassive Black Holes
accretion accretion discs black hole physics galaxies formation – galaxies
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2010/11/12
We investigate whether a circumbinary gas disc can coalesce a supermassive black hole
binary system in the centre of a galaxy. This is known to be problematic for a prograde disc.
We show that in co...
Acceleration of particles by black holes -- general explanation
Acceleration black holes general explanation
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2010/11/16
We give simple and general explanation to the effect of unbound acceleration of particles by black holes. It is related to the fact that the scalar product of a timelike vector of the four-velocity of...
Search of sub-parsec massive binary black holes through line diagnosis
sub-parsec binary black holes
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2011/1/10
We investigate on the spectral properties of an active black hole, member of a massive (10^7 - 10^9 Msun) sub-parsec black hole binary. We work under the hypothesis that the binary, surrounded by a ci...
Properties of Accretion Flows Around Coalescing Supermassive Black Holes
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
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2010/12/29
What are the properties of accretion flows in the vicinity of coalescing supermassive black holes (SBHs)? The answer to this question has direct implications for the feasibility of coincident detectio...
Cosmological evolution of massive black holes: effects of Eddington ratio distribution and quasar lifetime
Galaxy Astrophysics (astro-ph.GA)
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2010/12/22
A power-law time-dependent lightcurve for active galactic nuclei (AGNs) is expected by the self-regulated black hole growth scenario, in which the feedback of AGNs expels gas and shut down accretion. ...
Cosmological evolution of massive black holes: effects of Eddington ratio distribution and quasar lifetime
Galaxy Astrophysics (astro-ph.GA)
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2010/12/22
A power-law time-dependent lightcurve for active galactic nuclei (AGNs) is expected by the self-regulated black hole growth scenario, in which the feedback of AGNs expels gas and shut down accretion. ...
Supermassive black holes spawned by galactic merger（图）
black holes galactic merger
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2010/9/21
Lurking at the centre of nearly every galaxy and gobbling up stars in their vicinity, supermassive black holes are a truly menacing feature of the universe. Now, an international team of astronomers c...
What are 'mini' black holes?（图）
black holes the Large Hadron Collider unwary spaceships and planets
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2010/4/29
In films and books black holes capture unwary spaceships and planets, gobble up whole galaxies or offer portals to other parts of the Universe.So the idea that, with the start of the Large Hadron Coll...
Particle Accelerators inside Spinning Black Holes
Particle Accelerators Spinning Black Holes
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2010/3/18
On the basis of the Kerr metric as a model for a spinning black hole accreting test particles from rest at infinity, I show that the center-of-mass energy for a pair of colliding particles is generica...
An instability of higher-dimensional rotating black holes
higher-dimensional black holes
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2010/3/19
We present the first example of a linearized gravitational instability of an asymptotically flat vacuum black hole. We study perturbations of a Myers-Perry black hole with equal angular momenta in an ...
On Thermal Radiation of Black Holes
Thermal Radiation Black Holes
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2010/3/22
We calculate intensity of thermal radiation (via Hawking effect) and evaporation time of a stationary nonrotating black hole using Kirchhoff's law and the electrodynamic membrane paradigm. It is shown...
Large Extra Dimensions and Small Black Holes at the LHC
Black Holes Dimensions mass-scale M
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2010/3/19
We present an overview on the conjectured production of microscopic black holes as a consequence of high energy hadronic collisions at the LHC, CERN (Geneva, Switzerland) from this year on. Provided t...
Production of tidal-charged black holes at the Large Hadron Collider
Tidal-charged black hole Large Hadron Collider
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2010/3/18
Tidal-charged black hole solutions localized on a three-brane in the five-dimensional gravity scenario of Randall and Sundrum have been known for some time. The solutions have been used to study the d...