Results 111 to 120 of about 32,039 (196)
The first supermassive black holes
, 2017 We briefly review the historical development of the ideas regarding the first supermassive black hole seeds, the physics of their formation and radiative feedback, recent theoretical and observational progress, and our outlook for the future.Comment ...
Bromm, Volker +2 more
core +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
The Black Hole Particle Accelerator as a Machine to make Baby Universes [PDF]
, 2013 General relativity predicts that the inner horizon of an astronomically realistic rotating black hole is subject to the mass inflation instability. The inflationary instability acts like a gravity-powered particle accelerator of extraordinary power ...
Hamilton, A. J. S.
core
Distant X-ray Galaxies: Insights from the Local Population
, 2004 A full understanding of the origin of the hard X-ray background requires a complete and accurate census of the distant galaxies that produce it. Unfortunately, distant X-ray galaxies tend to be very faint at all wavelengths, which hinders efforts to ...
A Comastri +35 more
core +1 more source
Dynamics Around Supermassive Black Holes: Extreme-mass-ratio Inspirals as Gravitational-wave Sources
The Astrophysical JournalSupermassive black holes and their surrounding dense stellar environments nourish a variety of astrophysical phenomena. We focus on the distribution of stellar-mass black holes around the supermassive black hole and the consequent formation of extreme ...
Barak Rom +3 more
doaj +1 more source
High-energy signatures of binary supermassive black holes
EPJ 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
, 2012 We consider test planet and photon orbits of the third kind inside a black hole, which are stable, periodic and neither come out of the black hole nor terminate at the singularity.
B. Carter +6 more
core +1 more source
Primordial black holes in cosmological simulations: growth prospects for supermassive black holes
The Open Journal of AstrophysicsIt has long been suggested that a fraction of the dark matter in the Universe could exist in the form of primordial black holes (PBHs) that have existed since the radiation dominated era.
Lewis R Prole +4 more
doaj +1 more source
Super-Eddington Accretion in Quasars
UniverseThis review provides an observational perspective on the fundamental properties of super-Eddington accretion onto supermassive black holes in quasars.
Paola Marziani +7 more
doaj +1 more source
Tidal disruption of stars by supermassive black holes: The X-ray view
EPJ Web of Conferences, 2012 The tidal disruption of stars by supermassive black holes produces luminous soft X-ray accretion flares in otherwise inactive galaxies. First events have been discovered in X-rays with the ROSAT observatory, and have more recently been detected with XMM ...
Komossa S.
doaj +1 more source