Publication date: Jan 2012
Abstract:
Marginally stable perfect fluid tori with uniform distribution of specific angular momentum are determined in the Reissner-Nordström-(anti-)de Sitter black-hole and nakedsingularity spacetimes. Toroidal configurations are allowed only in the spacetimes admitting existence of stable circular geodesics. The configurations with equipotential surfaces crossing itself in a cusp allow accretion (inner cusp) and/or excretion (outer cusp) of matter from the toroidal configuration.
Authors:
Kučaková, Hana; Stuchlík, Zdeněk; Slaný, Petr;