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    Ringed Accretion Disks: Equilibrium Configurations

    Zdeněk Stuchlík · 01 prosince, 2015 · Fyzika · 0 comments
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    Publication date: Dec 2015

    Abstract:
    We investigate a model of a ringed accretion disk, made up by several
    rings rotating around a supermassive Kerr black hole attractor. Each
    toroid of the ringed disk is governed by the general relativity
    hydrodynamic Boyer condition of equilibrium configurations of rotating
    perfect fluids. Properties of the tori can then be determined by an
    appropriately defined effective potential reflecting the background Kerr
    geometry and the centrifugal effects. The ringed disks could be created
    in various regimes during the evolution of matter configurations around
    supermassive black holes. Therefore, both corotating and counterrotating
    rings have to be considered as being a constituent of the ringed disk.
    We provide constraints on the model parameters for the existence and
    stability of various ringed configurations and discuss occurrence of
    accretion onto the Kerr black hole and possible launching of jets from
    the ringed disk. We demonstrate that various ringed disks can be
    characterized by a maximum number of rings. We present also a
    perturbation analysis based on evolution of the oscillating components
    of the ringed disk. The dynamics of the unstable phases of the ringed
    disk evolution seems to be promising in relation to high-energy
    phenomena demonstrated in active galactic nuclei.

    Authors:
    Pugliese, D.; Stuchlík, Z.;

    http://adsabs.harvard.edu/abs/2015ApJS..221…25P

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