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...
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 ...
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 ...
We investigate the possibility that there is a first phase of partial ionisation due to X-rays produced by black hole accretion in small-mass galaxies at redshifts 7<z<20. This is followed by complete reionisation by stellar sources at z~7. This scenario is motivated by the large optical...
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 ...
These signatures and evidence suggest an analogy among all kinds of accretion systems which span from stellar mass to supermassive black holes, hinting at unified accretion and ejection physics. To validate the unified model, we explore the correlation between the scale of outflows (corresponding 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...
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...
内容提示: Primordial Black Holes in Matter-Dominated Eras: the Role of AccretionValerio De Luca, 1, ∗ Gabriele Franciolini, 2, † Alex Kehagias, 3, ‡ Paolo Pani, 2,4, § and Antonio Riotto 1, ¶1 Département de Physique Théorique and Centre for Astroparticle Physics (CAP),...
Third, uncertainties on the mass of and distance to the SMBH can be improved by a factor of $sim$10. Finally, we can also study the near-infrared accretion onto the black hole at unprecedented sensitivity and time resolution, which can reveal the underlying physics of black hole accretion....