Results 81 to 90 of about 38,906 (246)
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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Powerful Radio Sources as Probes of Black Hole Physics
UniversePowerful jetted radio sources for which the luminosity in directed kinetic energy has been empirically determined, independent of assumptions, are considered.
Ruth A. Daly
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Black-Hole Bombs and Photon-Mass Bounds
, 2012 Generic extensions of the standard model predict the existence of ultralight bosonic degrees of freedom. Several ongoing experiments are aimed at detecting these particles or constraining their mass range.
A. A. Starobinsky +8 more
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Supermassive black holes in galactic nuclei
AIP Conference Proceedings, 2001 We review the motivation and search for supermassive black holes (BHs) in galaxies. Energetic nuclear activity provides indirect but compelling evidence for BH engines. Ground-based dynamical searches for central dark objects are reviewed in Kormendy & Richstone (1995, ARA&A, 33, 581). Here we provide an update of results from the HST.
John Kormendy, Karl Gebhardt
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Supermassive Black Hole Growth in Hierarchically Merging Nuclear Star Clusters
The Astrophysical JournalSupermassive black holes are prevalent at the centers of massive galaxies, and their masses scale with galaxy properties, increasing evidence suggesting that these trends continue to low stellar masses.
Konstantinos Kritos +7 more
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Black hole shadow with a cosmological constant for cosmological observers
European Physical Journal C: Particles and Fields, 2019 We investigate the effect of the cosmological constant on the angular size of a black hole shadow. It is known that the accelerated expansion which is created by the cosmological constant changes the angular size of the black hole shadow for static ...
Javad T. Firouzjaee, Alireza Allahyari
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Evolution of black hole shadow in the presence of ultralight bosons
Physics Letters B, 2020 Kerr black holes coupled to quantized bosonic fields display a special version of the Hawking effect, governed by the superradiance condition. This leads to rapid growth of boson cloud through spontaneous creation, leading to slowing down of the black ...
Rittick Roy, Urjit A. Yajnik
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European Physical Journal C: Particles and FieldsWe investigate the strong gravitational lensing effects of various supermassive compact objects for the static and spherically symmetric hairy black hole by gravitational decoupling.
G. Mustafa, S. K. Maurya
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Starburst-AGN Connection: A Lesson from High-z Powerful Radio Galaxies
, 2004 Powerful radio galaxies at high redshift are highly useful in studies of early evolution of AGN-hosting galaxies because their observed optical and near infrared light are dominated by their stellar population rather than the nonthermal continuum emitted
Taniguchi, Yoshiaki
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M87 Supermassive Black Hole Review
International Journal of Science and Research (IJSR), 2021 M87 is a giant elliptical galaxy in the Virgo cluster of galaxies. The radio source has a core which coincides with the nucleus of the galaxy and a jet of emission which is detected from radio to X-ray bands. A supermassive black hole is assumed to be at the centre of M87 which sends out relativistic particles in the form jets along its axis of ...
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