Inner region accretion flows onto black holes

Abstract

We examine here the inner region accretion flows onto black holes. A variety of models are presented. We also discuss viscosity mechanisms under a variety of circumstances, for standard accretion disks onto galactic black holes and supermassive black holes and hot accretion disks. Relevant work is presented here on unified aspects of disk accretion onto supermassive black holes and the possible coupling of thick disks to beams in the inner regions. We also explore other accretion flow scenarios. We conclude that a variety of scenarios yield high temperatures in the inner flows and that viscosity is likely not higher than alpha $\sim$ 0.01.

to appear in "The Neutron Star - Black Hole Connection", proceedings of NATO Advanced Study Institute, 7 - 18 June 1999, Elounda, Crete, Greece

References in corpus (13)

• Advection-Dominated Accretion: A Self-Similar Solution
• On the Fate of Gas Accreting at a Low Rate onto a Black Hole
• Advection-Dominated Accretion and the Spectral States of Black Hole X-Ray Binaries: Application to Nova Muscae 1991
• Spectral Properties of Accretion Disks Around Galactic and Extragalactic Black Holes
• Grand Unification of Solutions of Accretion and Winds around Black Holes and Neutron Stars
• X-ray Spectral Formation in a Converging Fluid Flow: Spherical Accretion into Black Holes
• Turbulence and angular momentum transport in a global accretion disk simulation
• The Extended Power Law as Intrinsic Signature For a Black Hole
• Formation of Relativistic Outflows in Shearing Black Hole Accretion Coronae
• The High-Energy Spectra of Accreting Black Holes: Observational Evidence for Bulk-Motion Infall
• Time-dependent quasi-spherical accretion
• Ion viscosity mediated by tangled Magnetic fields-An application to Black Hole Accretion disks
• Turbulent Convection in Thin Accretion Disks