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ACCRETION MECHANISMS ONTO PRIMORDIAL BLACK HOLES
(WORLD SCIENTIFIC PUBL CO PTE LTD, 2010)
We study the evolution of a primordial black hole (PBH) taking into account the presence of dark energy modeled by a general perfect fluid. In the specific case of a stationary non-self-gravitating test fluid, the competition ...
Consistency of the mass variation formula for black holes accreting cosmological fluids
(SPRINGER/PLENUM PUBLISHERSNEW YORK, 2012-04-02)
We address the spherical accretion of generic fluids onto black holes. We show that, if the black hole metric satisfies certain conditions, in the presence of a test fluid it is possible to derive a fully relativistic ...
The Gaia-ESO Survey: A new diagnostic for accretion and outflow activity in the young cluster NGC 2264
(European Southern Observatory, 2020)
Context. NGC 2264 is a young cluster whose accretion properties can be investigated in detail by taking advantage of the FLAMES data in the context of the Gaia-ESO Survey. In fact, the analysis of the Hα emission line ...
On twin peak quasi-periodic oscillations resulting from the interaction between discoseismic modes and turbulence in accretion discs around black holes
(2020)
Given the peculiar and (in spite of many efforts) unexplained quasi-periodic oscillation (QPO) twin peak phenomena in accretion disc psd observations, the present
exploratory analytical article tries to inquire deeper ...
The viscosity parameter's dependence on the profile of the disk scale height
(UNIV CHICAGO PRESS, 2008)
It is shown that, for accretion disks, the height scale is a constant whenever hydrostatic equilibrium and the subsonic turbulence regime hold in the disk. In order to have a variable height scale, processes are needed ...