Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes

@article{45002,
   author = {Kučáková, Hana and Slaný, Petr and Stuchlík, Zdeněk},
   article_location = {GB - Spojené království Velké Británie a},
   article_number = {1},
   doi = {http://dx.doi.org/10.1088/1475-7516/2011/01/033},
   keywords = {astrophysical fluid dynamics, GR black holes, accretion, dark energy theory},
   language = {eng},
   issn = {1475-7516},
   journal = {Journal of Cosmology and Astroparticle Physics},
   title = {Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes},
   year = {2011}
}

TY  - JOUR
ID  - 45002
AU  - Kučáková, Hana - Slaný, Petr - Stuchlík, Zdeněk
PY  - 2011
TI  - Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes
JF  - Journal of Cosmology and Astroparticle Physics
IS  - 1
SN  - 14757516
KW  - astrophysical fluid dynamics, GR black holes, accretion, dark energy theory
N2  - 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
ER  - 

KUČÁKOVÁ, Hana, Petr SLANÝ a Zdeněk STUCHLÍK. Toroidal configurations of perfect fluid in the Reissner-Nordstrom-(anti-)de Sitter spacetimes. \textit{Journal of Cosmology and Astroparticle Physics}. GB - Spojené království Velké Británie a, č.~1, 38 s. ISSN~1475-7516. doi:10.1088/1475-7516/2011/01/033. 2011.