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    Observational phenomena related to primordial Kerr superspinars

    Zdeněk Stuchlík · 01 března, 2012 · Fyzika · 0 comments
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    Publication date: Mar 2012

    Abstract:
    String theory indicates the existence of primordial Kerr superspinars,
    extremely compact objects with exterior described by the Kerr
    naked-singularity geometry. The primordial superspinars have to be
    converted to a black hole due to accretion, but they could survive to
    the era of high-redshift quasars. We discuss observational phenomena
    caused by the primordial Kerr superspinars in this era, considering the
    properties of corotating Keplerian accretion discs orbiting such
    superspinars and the optical phenomena modified by their presence. The
    potential well around a near-extreme superspinar with spin a very close
    to the extreme black hole value a = 1 is very deep so that the
    efficiency of the accretion process reaches 157.7%, influencing thus
    significantly the spectral continuum of corotating Keplerian discs and
    giving a signature of near-extreme superspinars. Such superspinars can
    also serve as an efficient accelerator for extremely high-energy
    collisions. Phenomena enabling a clear distinction of primordial Kerr
    superspinars and black holes are related to the disc oscillations with
    the radial and vertical epicyclic frequencies and the most profound
    could be differences implied by the profiled spectral lines generated in
    the innermost parts of the corotating Keplerian discs.

    Authors:
    Stuchlík, Zdeněk; Schee, Jan;

    http://adsabs.harvard.edu/abs/2012CQGra..29f5002S

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