AGN Accretion Discs
Abstract
I present the elements of accretion-disc physics applied to active galactic nuclei. The accretion driving mechanisms are discussed, then models of geometrically-thin discs, both stationary and time-dependent, are addressed. Disc's self-gravitation in the AGN context is presented. The shapes of spectral line from accretion discs are explained in both newtonian and relativistic cases. The physics of disc's thermal and viscous instabilities is dicussed in detail and models are applied to AGN discs. Finally, the problems of thick accretion flows (ADAFs and slim discs), disc coronae, winds and jets are discussed in some detail. This is a graduate-student level lecture, not a review article
Cite
@article{arxiv.2302.07925,
title = {AGN Accretion Discs},
author = {Jean-Pierre Lasota},
journal= {arXiv preprint arXiv:2302.07925},
year = {2023}
}
Comments
Updated version of Chapter 3 in "Active Galactic Nuclei"; F. Combes ed.; iSTE/Wiley 2022; DOI:10.1002/9781394163724. One figure (Fig. 2.) and several references added. A graduate-student level lecture on accretion discs in active galactic nuclei, not a review article. arXiv admin note: substantial text overlap with arXiv:1505.02172. Equations 125 and 126 corrected