J
2011
Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes
KUČÁKOVÁ, Hana, Petr SLANÝ and Zdeněk STUCHLÍK
Basic information
Original name
Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes
Edition
Journal of Cosmology and Astroparticle Physics, GB - Spojené království Velké Británie a, 2011, 1475-7516
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
Keywords in English
astrophysical fluid dynamics, GR black holes, accretion, dark energy theory
Tags
International impact, Reviewed
Links
LC06014, research and development project. MSM4781305903, plan (intention).
V originále
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
Displayed: 25/12/2024 05:15