Ringed Accretion Disks: Instabilities
Abstract
We analyze the possibility that several instability points may be formed, due to the Paczyński mechanism of violation of mechanical equilibrium, in the orbiting matter around a supermassive Kerr black hole. We consider a recently proposed model of a ringed accretion disk, made up by several tori (rings) that can be corotating or counterrotating relative to the Kerr attractor due to the history of the accretion process. Each torus is governed by the general relativistic hydrodynamic Boyer condition of equilibrium configurations of rotating perfect fluids. We prove that the number of the instability points is generally limited and depends on the dimensionless spin of the rotating attractor.
 Publication:

The Astrophysical Journal Supplement Series
 Pub Date:
 April 2016
 DOI:
 10.3847/00670049/223/2/27
 arXiv:
 arXiv:1603.00732
 Bibcode:
 2016ApJS..223...27P
 Keywords:

 accretion;
 accretion disks;
 black hole physics;
 hydrodynamics;
 instabilities;
 Astrophysics  High Energy Astrophysical Phenomena;
 General Relativity and Quantum Cosmology
 EPrint:
 15 pages, 2 figures multipanels, 3 tables. to appear in Astrophysical Journal Supplement Series