Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. It can be formed by the death of a massive star wherein its core gravitationally collapses inward upon itself, compressing to a point of zero volume and
accretion, accretion disksblack hole physicssupernovae, generalMassive stars in a certain mass range (20 –40 M⊙ may form low mass black holes after supernova explosions. In such massive stars, fall back of O.1 M⊙ materials onto a black hole is expected due to a deep gravitational ...
M87, giant elliptical galaxy in the constellation Virgo whose nucleus contains a black hole, the first ever to be directly imaged. M87 is the most powerful known source of radio energy among the thousands of galactic systems constituting the so-called Vi
Bang is poorly understood. A standard picture of Eddington-limited accretion of massive Pop III seed black holes cannot reasonably produce the SMBHs seen at high redshift, so super-Eddington growth or an increase in the mass of the black hole seeds are often touted as potential solutions[95]...
We selected a sample of 28 Type 1 active galactic nuclei for which a black hole mass has been inferred using the reverberation mapping technique and single epoch scaling relations. All 28 sources show clear evidence of the “Big Blue Bump” in the optica
Gravastars, hypothetic astrophysical objects, consisting of a dark energy condensate surrounded by a strongly correlated thin shell of anisotropic matter, have been proposed as an alternative to the standard black hole picture of general relativity. Observationally distinguishing between astrophysical black...
The effect of an accretion disk on the Blandford-Znajek process and the evolution of a black hole are discussed using a simplified system for the black hole - accretion disk in which the accretion rate is supposed to be dominated by the strong magnetic field on the disk. The evolutions of...
Full size image Thus, when viewing the equatorial plane of a spinning black hole both prograde and retrograde reflections display the exponential repetition, but prograde copies of a source will repeat rapidly compared to the retrograde copies. This asymmetry has potentially far-reaching applications to...
which demonstrates that modern all-sky surveys have much to reveal. The black hole in this quasar accretes around one solar mass per day onto an existing mass of∼17 billion solar masses. In this process, the accretion disk alone releases a radiative energy of 2 × 1041 W. If th...
Bromley, B.C., Miller, W.A., and Pariev, V.I., "The inner edge of the accretion disk around a supermassive black hole", Nature, 391, 54-56, (1998). 4.2Bromley, B. C., Miller, W. A. and Pariev, V. I. (1998), The inner edge of the accretion disk around a supermassive...