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    Profiles of emission lines generated by rings orbiting braneworld Kerr black holes

    Zdeněk Stuchlík · Srpen 01, 2009 · Fyzika · 0 comments
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    Publication date: Aug 2009

    Abstract:
    In the framework of the braneworld models, rotating black holes can be
    described by the Kerr metric with a tidal charge representing the
    influence of the non-local gravitational (tidal) effects of the bulk
    space Weyl tensor onto the black hole spacetime. We study the influence
    of the tidal charge onto profiled spectral lines generated by radiating
    tori orbiting in vicinity of a rotating black hole. We show that with
    lowering the negative tidal charge of the black hole, the profiled line
    becomes to be flatter and wider keeping their standard character with
    flux stronger at the blue edge of the profiled line. The extension of
    the line grows with radius falling and inclination angle growing. With
    growing inclination angle a small hump appears in the profiled lines due
    to the strong lensing effect of photons coming from regions behind the
    black hole. For positive tidal charge ( b > 0) and high inclination
    angles two small humps appear in the profiled lines close to the red and
    blue edge of the lines due to the strong lensing effect. We can conclude
    that for all values of b, the strongest effect on the profiled lines
    shape (extension) is caused by the changes of the inclination angle.

    Authors:
    Schee, Jan; Stuchlík, Zdeněk;

    https://ui.adsabs.harvard.edu/abs/2009GReGr..41.1795S

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