Results 111 to 120 of about 37,815 (249)

Enhancing the rate of tidal disruptions of stars by a self-gravitating disc around a massive central black hole

open access: yesEPJ Web of Conferences, 2012
We further study the idea that a self-gravitating accretion disc around a supermassive black hole can increase the rate of gradual orbital decay of stellar trajectories (and hence tidal disruption events) by setting some stars on eccentric trajectories ...
Šubr L., Karas V.
doaj   +1 more source

Strong deflection gravitational lensing by a modified Hayward black hole

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
A modified Hayward black hole is a nonsingular black hole. It is proposed that it would form when the pressure generated by quantum gravity can stop matter’s collapse as the matter reaches the Planck density.
Shan-Shan Zhao, Yi Xie
doaj   +1 more source

Formation of Merging Stellar-mass Black Hole Binaries by Gravitational-wave Emission in Active Galactic Nucleus Disks

open access: yesThe Astrophysical Journal
Many stellar-mass black holes (sBHs) are expected to orbit supermassive black holes at galactic centers. For galaxies with active galactic nuclei, it is likely that the sBHs reside in a disk.
Barak Rom, Re’em Sari, Dong Lai
doaj   +1 more source

Relativistic Suppression of Black Hole Recoils [PDF]

open access: yes, 2010
Numerical-relativity simulations indicate that the black hole produced in a binary merger can recoil with a velocity up to v_max ~ 4,000 km/s with respect to the center of mass of the initial binary.
Baker   +20 more
core   +2 more sources

High-energy signatures of binary supermassive black holes

open access: yesEPJ Web of Conferences, 2013
Some active galactic nuclei are supposed to harbor binary systems of supermassive black holes. They are an attractive target for gravitational wave experiments.
Vila Gabriela S.   +2 more
doaj   +1 more source

Supermassive Black Holes and Galaxy Formation [PDF]

open access: yes, 2002
Abstract Predicted by the theory of general relativity, black holes are among the strangest objects known to exist. A point in space usually has a past and a future. An explosion is an example of a point in space–time. The explosion is both at a specific point in space and at a specific time.
openaire   +3 more sources

Is there life inside black holes?

open access: yes, 2011
Bound inside rotating or charged black holes, there are stable periodic planetary orbits, which neither come out nor terminate at the central singularity. Stable periodic orbits inside black holes exist even for photons. These bound orbits may be defined
Balek V   +15 more
core   +1 more source

Null Geodesics and Strong Field Gravitational Lensing of Black Hole with Global Monopole

open access: yesAdvances in High Energy Physics, 2015
We study two interesting features of a black hole with an ordinary as well as phantom global monopole. Firstly, we investigate null geodesics which imply unstable orbital motion of particles for both cases.
M. Sharif, Sehrish Iftikhar
doaj   +1 more source

MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN

open access: yesActa Polytechnica, 2013
Measuring the spins of supermassive black holes (SMBHs) in active galactic nuclei (AGN) can inform us about the relative role of gas accretion vs. mergers in recent epochs of the life of the host galaxy and its AGN.
Laura Brenneman
doaj   +1 more source

Observational Constraints on the Self Interacting Dark Matter Scenario and the Growth of Supermassive Black Holes

open access: yes, 2001
We consider the consequences of SIDM for a velocity dependent cross section per unit mass. Accretion of SIDM onto seed black holes can produce supermassive black holes that are too large for certain combinations of parameters,which is used to obtain a ...
Dalcanton J. J.   +7 more
core   +1 more source

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