RINGED ACCRETION DISKS: INSTABILITIES
D. PuglieseInstitute of Physics and Research Centre of Theoretical Physics and Astrophysics, Faculty of Philosophy & Science, Silesian University in Opava, Bezručovo náměstí 13, CZ-74601 Opava, Czech Republic; [email protected], [email protected]Z. StuchlíkInstitute of Physics and Research Centre of Theoretical Physics and Astrophysics, Faculty of Philosophy & Science, Silesian University in Opava, Bezručovo náměstí 13, CZ-74601 Opava, Czech Republic; [email protected], [email protected]
2016en
ABI
Abstract
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 counter-rotating 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.
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Cited by 30 references