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2007•arXiv (Cornell University)Open access

Accretion Disks in AGNs

Omer Blaes

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Abstract

I briefly review the theoretical models of radiatively efficient, geometrically thin and optically thick accretion disk spectra that currently exist for AGN. I then discuss three recent observational developments that have real potential to teach us about the physics of these flows. Finally, I present results on the most recent, thermodynamically consistent simulations of magnetorotational turbulence and discuss what these simulations are suggesting about the vertical structure of accretion disks.

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What this paper is about

I briefly review the theoretical models of radiatively efficient, geometrically thin and optically thick accretion disk spectra that currently exist for AGN. I then discuss three recent observational developments that have real potential to teach us about the physics of these flows. Finally, I present results on the most recent, thermodynamically consistent simulations of magnetorotational turbulence and discuss what these simulations are suggesting about the vertical structure of accretion disks.

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Available abstract

I briefly review the theoretical models of radiatively efficient, geometrically thin and optically thick accretion disk spectra that currently exist for AGN. I then discuss three recent observational developments that have real potential to teach us about the physics of these flows. Finally, I present results on the most recent, thermodynamically consistent simulations of magnetorotational turbulence and discuss what these simulations are suggesting about the vertical structure of accretion disks.

Key concepts: Accretion (finance), Accretion disc, Physics, Magnetorotational instability, Astrophysics, Turbulence, Active galactic nucleus, Magnetohydrodynamics

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