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

    Zdeněk Stuchlík · Leden 01, 2011 · Fyzika · 0 comments
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    Publication date: Jan 2011

    Abstract:
    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 in the Reissner-
    Nordström-(anti-)de Sitter spacetimes. Toroidal configurations are
    allowed only in the spacetimes admitting existence of stable circular
    geodesics. Configurations with marginally closed equipotential
    (equipressure) surfaces crossing itself in 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-Nordström-(anti-)de Sitter spacetimes according to properties
    of the marginally stable tori is given. It is demonstrated that in the
    Reissner-Nordström-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 directions. In naked-singularity
    spacetimes the accretion onto the central singularity is impossible due
    to existence of a potential barrier.

    Authors:
    Kucáková, Hana; Slaný, Petr; Stuchlík, Zdenĕk;

    https://ui.adsabs.harvard.edu/abs/2011JCAP…01..033K

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