2011
Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes
KUČÁKOVÁ, Hana; Petr SLANÝ and Zdeněk STUCHLÍKBasic information
Original name
Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes
Authors
Edition
Journal of Cosmology and Astroparticle Physics, GB - Spojené království Velké Británie a, 2011, 1475-7516
Other information
Language
English
Type of outcome
Article in a journal
Field of Study
10308 Astronomy
Confidentiality degree
is not subject to a state or trade secret
Impact factor
Impact factor: 5.723
Organization unit
Faculty of Philosophy and Science in Opava
UT WoS
000286802900033
EID Scopus
2-s2.0-79551666583
Keywords in English
astrophysical fluid dynamics, GR black holes, accretion, dark energy theory
Tags
Tags
International impact, Reviewed
Links
LC06014, research and development project. MSM4781305903, plan (intention).
Changed: 13/1/2021 10:58, Mgr. Pavlína Jalůvková
Abstract
In the original language
Influence of cosmological constant on toroidal fluid configurations around charged spherically symmetric black holes and naked singularities is demostrated by study of perfect fluid tori with uniform distribution of specific angular momentum orbiting inthe Reissner-Nordstrom-(anti-)de Sitter spacetimes. Toroidal configurations are allowed only in the space times admitting existence of stable circular geodesics. Configurations with marginally closed equipotential (equipressure) surfaces crossing itselfin a cusp allow accretion (through the inner cusp) and/or excretion (through the outer cusp) of matter from the toroidal configuration. Detailed classification of the Reissner-Nordstrom-(anti-)de Sitter spacetimes according to properties of the marginally stable tori is given. It is demonstrated that in the Reissner-Nordstrom-de Sitter naked-singularity spacetimes an interesting phenomenon of doubled tori can exist enabling exchange of matter between two tori in both inward and outward d