Publication date: Apr 2007
Abstract:
Properties of equipotential surfaces in test perfect fluid tori with
uniform distribution of the specific angular momentum orbiting KdS black
holes will be summarized. The last closed surface crosses itself in the
cusp(s) enabling outflow(s) of matter from the torus. The repulsive
(positive) cosmological constant is responsible for the existence of the
outer cusp (with a stabilizing effect on the tori because of the
excretion) and strong collimation of open equipotential surfaces along
the rotational axis. We shall present the mass estimates for tori with
an adiabatic equation of state enabling to put limits on their central
mass density, for which the approximation of test fluid is adequate.
Authors:
Slaný, Petr; Stuchlík, Zdeněk;