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;