Results 31 to 40 of about 1,397 (183)
Gravitational lensing by a quantum deformed Schwarzschild black hole
European Physical Journal C: Particles and Fields, 2021 We investigate the weak and strong deflection gravitational lensing by a quantum deformed Schwarzschild black hole and find their observables. These lensing observables are evaluated and the detectability of the quantum deformation is assessed, after ...
Xu Lu, Yi Xie
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DYNAMICAL FRICTION AROUND SUPERMASSIVE BLACK HOLES [PDF]
The Astrophysical Journal, 2011 The density of stars in galactic bulges is often observed to be flat or slowly rising inside the influence radius of the supermassive black hole (SMBH). Attributing the dynamical friction force to stars moving more slowly than the test body, as is commonly done, is likely to be a poor approximation in such a core since there are no stars moving more ...
Antonini, Fabio, Merritt, David
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European Physical Journal C: Particles and Fields, 2023 Supermassive black holes from the center of galaxy may be immersed in a dark matter halo. This dark matter halo may form a “cusp” structure around the black hole and disappear at a certain distance from the black hole.
Dong Liu +4 more
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Key Science Goals for the Next-Generation Event Horizon Telescope
Galaxies, 2023 The Event Horizon Telescope (EHT) has led to the first images of a supermassive black hole, revealing the central compact objects in the elliptical galaxy M87 and the Milky Way.
Michael D. Johnson +44 more
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Strong deflection lensing by a Lee–Wick black hole
Physics Letters B, 2017 We study strong deflection gravitational lensing by a Lee–Wick black hole, which is a non-singular black hole generated by a high derivative modification of Einstein–Hilbert action.
Shan-Shan Zhao, Yi Xie
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Black Hole Images as Tests of General Relativity: Effects of Spacetime Geometry
The Astrophysical Journal, 2023 The images of supermassive black holes surrounded by optically thin, radiatively inefficient accretion flows, like those observed with the Event Horizon Telescope, are characterized by a bright ring of emission surrounding the black hole shadow.
Ziri Younsi +2 more
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A supermassive black hole awakes [PDF]
Science, 2017 Active Galaxies Every large galaxy hosts a supermassive black hole at its center, which grows by consuming passing gas or stars. Most are quiescent, but when the black hole is feeding, an accretion disk forms, causing the galaxy nucleus to shine brightly as a quasar. Gezari et al.
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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.
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Close supermassive binary black holes [PDF]
Nature, 2010 Nature in press. 4 pages, 1 figure [Title, abstract, text, and references shortened to conform to journal requirements]
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On the High-Energy Neutrino Emission from Active Galactic Nuclei
Universe, 2018 We review observational aspects of the active galactic nuclei and their jets in connection with the detection of high-energy neutrinos by the Antarctic IceCube Neutrino Observatory.
Emma Kun +3 more
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