Results 111 to 120 of about 8,827 (222)
Strong deflection gravitational lensing by a modified Hayward black hole
European 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
Supermassive black holes with stellar companions
AIP Conference Proceedings, 1994 Low‐mass stars in close orbits around supermassive black holes in active galactic nuclei (AGN) may provide an important signature for testing the existence of supermassive black holes. Here we discuss how such systems can form by being ‘‘ground down’’ by their interaction with an AGN accretion disk and discuss the peculiarities of such binaries with ...
Podsiadlowski, P, Rees, M
openaire +2 more sources
Impact of supermassive black hole growth on star formation [PDF]
, 2017 \ua9 2017 Macmillan Publishers Limited. Supermassive black holes are found at the centres of massive galaxies. During the growth of these black holes they light up to become visible as active galactic nuclei (AGNs) and release extraordinary amounts of ...
Harrison CM, C. M. Harrison
core +1 more source
Fundamental physics opportunities with the next-generation Event Horizon Telescope
Living Reviews in RelativityThe Event Horizon Telescope (EHT) Collaboration recently published the first images of the supermassive black holes in the cores of the Messier 87 and Milky Way galaxies.
Dimitry Ayzenberg +47 more
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Dark matter annihilation via Breit-Wigner enhancement with heavier mediator
Physics Letters BWe propose a new scenario that both the dark matter freeze-out in the early Universe and its possible annihilation for indirect detection around a supermassive black hole are enhanced by a Breit-Wigner resonance.
Yu Cheng +3 more
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Galaxies, 2019 In this review a summary is given on recent theoretical work, on understanding accreting supermassive black hole binaries in the gravitational wave (GW)-driven regime. A particular focus is given to theoretical predictions of properties of disks and jets
Roman Gold
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Supermassive black holes in spiral galaxies [PDF]
Proceedings of the International Astronomical Union, 2004 6 pages, 5 figures, to be published in "The Interplay among Black Holes, Stars and ISM in Galactic Nuclei," Th. Storchi Bergmann, L.C. Ho & H.R.
openaire +2 more sources
Possibility of measuring spin precession of the nearest supermassive black hole by using S stars [PDF]
, 2014 The supermassive black hole (SMBH) with a mass of 4 million M-circle dot inside the radio source Sgr A* in our Galactic center is the nearest SMBH. Once S stars with a shorter period are observed, relativistic precessions especially the Lense-Thirring ...
Han, Wen-Biao
core
Primordial Origins of Supermassive Black Holes [PDF]
, 2019 At the center of the Milky Way sits a supermassive black hole named Sagittarius A*1, which is over a million times the mass of our sun. Other galaxy centers host similar black holes which are up to thousands of times larger than even Sagittarius A*. Some
Black, William, Neilson, David
core +1 more source
Supermassive Black Hole Masses of AGNs with Elliptical Hosts [PDF]
, 2002 The recently discovered tight correlation between supermassive black hole mass and central velocity dispersion for both inactive and active galaxies suggests a possibility to estimate the black hole mass from the measured central velocity dispersion ...
Xue-Bing Wu +6 more
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