Schedule Feb 9, 1999
Instabilities in Accretion Disks
Dr. Jean-Marie Hameury, ITP & Obs-Strasbourg
I discuss the thermal-viscous instability that is thought to be responsible for the outbursts of dwarf novae in cataclysmic binaries and soft X-ray transients in low-mass X-ray binaries, and that could be present in young stellar objects as well as AGNs. I show that the illumination of the disk and of the companion star, as well as changes in the outer disk radius must be included in the models if one wishes to extract meaningful physical information on e.g. viscosity from the comparison of predicted and observed lightcurves.

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