Thermal and Viscous Instability of Accretion Disc in AGN

Details Thermal and Viscous Instability of Accretion Disc in AGN Thermal and Viscous Instability of Accretion Disc in AGN

2000-08-23

arxiv.org/abs/astro-ph/0008356v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures; poster presented at Advanced Lectures on Starburst AGN Connection, Mexico, June 2000

Scientific paper

The standard accretion discs are known to be thermally and viscously unstable over a certain range of temperatures. In the inner disc regions there may develop radiation pressure driven instability, which is possibly related to the rapid variability detected in AGNs in the UV range. In the outer disc develops the ionization instability, similar to that in the cataclysmic variables, but operating on much longer timescales. Due to this process the spectrum of the accretion disc differs from that of a stationary one.

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