Black holes were predicted long before the beginning of the space age; they were perceived as by-products of mathematical theories, existed only in the imagination of a few scientists. The idea of "dark stars" (they were dubbed "black holes" only in 1968) can be traced back to the late...
We examine the accretion process in a thin disk surrounding a supermassive black hole within the framework of Einstein–Maxwell-scalar (EMS) gravity. Our investigation aims to elucidate how variations in model parameters affect different physical properties of the disk. When keeping EMS parametersβand...
Several theories have been proposed to describe the formation of black hole seeds in the early Universe and to explain the emergence of very massive black holes observed in the first thousand million years after the Big Bang1,2,3. Models consider different seeding and accretion scenarios4,5,6,...
关键词: Accretion Accretion Disks Black Hole Physics Galaxies: Individual: NGC Number: NGC 2300 Galaxies: Individual: NGC Number: NGC 1399 Galaxies: Individual: NGC Number: NGC 4278 Galaxies: Individual: NGC Number: NGC 4594 Galaxies: Nuclei Radio Continuum: Galaxies 被引量: 68 ...
White Paper 4: "The physics of accretion-ejection with LOFT", Casella, P.; Fender, R.; Coriat, M.; Kalemci, E. Motta, S.; Neilsen, J.; Ponti, G.; Begelman, M. Belloni, T.; Koerding, E.; Maccarone, T. J. Petrucci, P.-O.; Rodriguez, J.; Tomsick, J. Bhattacharyya,...
This is a generalization of and an alternative to an 'ADAF' solution. Some observational implications and possible ways to distinguish these two types of flow are briefly discussed. 展开 关键词: accretion, accretion discs black hole physics hydrodynamics ...
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...
That "stuff" forms an accretion disk around the black hole. (Image credit: NASA/CXC) How big are black holes? The black hole in Cygnus X-1 has a mass about 20 times that of the sun, which is pretty typical for black holes throughout the universe. In our own galaxy, scientists have...
Accretion DiskSingularitiesBlack Hole PhysicsQuintessenceIt is well known that quantum effects may lead to remove the intrinsic singularity point of back holes. Also, the quintessence scalar field is a candidate model for describing late-time acceleration expansion. Accordingly, Kazakov and Solodukhin ...
holes around the epoch of reionization. Its properties are consistent with scenarios in which short bursts of super-Eddington accretion have resulted in black hole overgrowth and massive gas expulsion from the accretion disk; in between bursts, black holes spend most of their life in a dormant ...