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    Accretion processes in black-hole spacetimes with a repulsive cosmological constant

    Zdeněk Stuchlík · 01 prosince, 2001 · Fyzika · 0 comments
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    Publication date: Dec 2001

    Abstract:
    The influence of a repulsive cosmological constant on accretion
    processes onto black holes is discussed. The steady, spherically
    symmetric adiabatic inflow and outflow of perfect fluid is considered.
    Further, the attention is focused on the properties of both
    geometrically thin, Keplerian accretion disks and geometrically thick,
    toroidal disks having relevant pressure gradients. It is shown that
    nearby the static radius, where the gravitational attraction of a black
    hole is just balanced by the cosmological repulsion, the accretion
    toroidal disks have an outer cusp enabling outflow of matter from the
    disk. Behind the static radius the cosmological repulsion efficiently
    collimates jets that emanate along the rotation axis of the toroidal
    disk.

    Authors:
    Stuchlík, Z.;

    http://adsabs.harvard.edu/abs/2001ragt.meet..129S

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