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    Role of electric charge in shaping equilibrium configurations of fluid tori encircling black holes

    Zdeněk Stuchlík · 01 října, 2011 · Fyzika · 0 comments
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    Publication date: Oct 2011

    Abstract:
    Astrophysical fluids may acquire nonzero electrical charge because of
    strong irradiation or charge separation in a magnetic field. In this
    case, electromagnetic and gravitational forces may act together and
    produce new equilibrium configurations, which are different from the
    uncharged ones. Following our previous studies of charged test particles
    and uncharged perfect fluid tori encircling compact objects, we
    introduce here a simple test model of a charged perfect fluid torus in
    strong gravitational and electromagnetic fields. In contrast to ideal
    magnetohydrodynamic models, we consider here the opposite limit of
    negligible conductivity, where the charges are tied completely to the
    moving matter. This is an extreme limiting case which can provide a
    useful reference against which to compare subsequent more complicated
    astrophysically motivated calculations. To clearly demonstrate the
    features of our model, we construct three-dimensional axisymmetric
    charged toroidal configurations around Reissner-Nordström black
    holes and compare them with equivalent configurations of electrically
    neutral tori.

    Authors:
    Kovář, Jiří; Slaný, Petr; Stuchlík, Zdeněk; Karas, Vladimír; Cremaschini, Claudio; Miller, John C.;

    http://adsabs.harvard.edu/abs/2011PhRvD..84h4002K

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