Results 1 to 10 of about 234,699 (281)
Tidal disruption flares from stars on eccentric orbits
EPJ Web of Conferences, 2012 We study tidal disruption and subsequent mass fallback for stars approaching supermassive black holes on bound orbits, by performing three dimensional Smoothed Particle Hydrodynamics simulations with a pseudo-Newtonian potential.
Loeb A., Stone N., Hayasaki K.
doaj +1 more source
Supermassive Black Holes and Galaxy Formation [PDF]
, 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
Bayesian Black Hole Photogrammetry
The Astrophysical JournalWe propose an analytic dual-cone accretion model for horizon-scale images of the cores of low-luminosity active galactic nuclei, including those observed by the Event Horizon Telescope (EHT).
Dominic O. Chang +3 more
doaj +1 more source
GalaxiesWe propose that modifications to the Higgs potential within a narrow atmospheric layer near the event horizon of an astrophysical black hole could significantly enhance the rate of sphaleron transitions, as well as transform the Chern–Simons number into ...
Merab Gogberashvili +1 more
doaj +1 more source
Low-Mass AGN and Their Relation to the Fundamental Plane of Black Hole Accretion [PDF]
, 2014 We put active galactic nuclei (AGNs) with low-mass black holes on the fundamental plane of black hole accretion---the plane that relates X-ray emission, radio emission, and mass of an accreting black hole---to test whether or not the relation is universal for both stellar-mass and supermassive black holes.
arxiv +1 more source
Supermassive black holes formed by direct collapse of inflationary perturbations [PDF]
, 2016 We propose a mechanism of producing a new type of primordial perturbations that collapse to primordial black holes whose mass can be as large as necessary for them to grow to the supermassive black holes observed at high redshifts, without contradicting ...
T. Nakama, T. Suyama, J. Yokoyama
semanticscholar +1 more source
Two Radio Cores in GPS J1543-0757: A New Dual Supermassive Black Hole System?
The Astrophysical JournalWe report on the discovery of a dual supermassive black hole system in the radio galaxy J1543−0757, with a projected separation between the two black holes of ∼46 mas. The result is based on recent multifrequency observations using the Very Long Baseline
Xiaopeng Cheng, Bong Won Sohn
doaj +1 more source
Measuring spin of a supermassive black hole at the Galactic centre -- Implications for a unique spin [PDF]
, 2009 We determine the spin of a supermassive black hole in the context of discseismology by comparing newly detected quasi-periodic oscillations (QPOs) of radio emission in the Galactic centre, Sagittarius A* (Sgr A*), as well as infrared and X-ray emissions with those of the Galactic black holes.
arxiv +1 more source
Tests of Gravity Theories Using Supermassive Black Holes [PDF]
, 2017 Scalar-tensor theories of gravity generally violate the strong equivalence principle, namely that compact objects have a suppressed coupling to the scalar force, which causes them to fall slower.
Jeremy Sakstein +3 more
semanticscholar +1 more source
, 2007 26 pages, 15 figures, to appear in "Kerr Spacetime: Rotating Black Holes in General Relativity" eds. D.L. Wiltshire, M. Visser and S.M. Scott, (Cambridge Univ. Press)
openaire +2 more sources