The α-disk instability in the radiation pressure dominated zone

Teresi, V.; Molteni, D.; Valenza, M. A.
April 2000
AIP Conference Proceedings;2000, Vol. 513 Issue 1, p405
Academic Journal
It is well known from analytical work that the accretion disk model stated by Shakura and Sunyaev (Shakura and Sunyaev, 1973) shows, in the radiation pressure dominated zone, called the A zone, an instability, called the ‘Shakura-Sunyaev instability’. This work shows the results of some simulations of α-disks in the conditions that the analytical theory states as instability conditions. Our simulations are two dimensional (r-z) and time dependent. We use the Smoothed Particle method in cylindric coordinates. The simulations of the A zone follow the time evolution of the disks. It appears that convection is very important to stabilize the flow. © 2000 American Institute of Physics.


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