Publication date: Dec 2007
Abstract:
Marginally stable perfect fluid tori with uniform distribution of
specific angular momentum are determined in the Reissner-Nordström-de
Sitter black-hole and naked-singularity spacetimes. Perfect fluid
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. The classification of the Reissner-Nordström-de Sitter
spacetimes according to the properties of the marginally stable tori is
given.
Authors:
Stuchlík, Zdeněk; Kučáková, Hana; Slaný, Petr;