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    Neutrino trapping in extremely compact objects: I. Efficiency of trapping in the internal Schwarzschild spacetimes

    Zdeněk Stuchlík · 01 února, 2009 · Fyzika · 0 comments
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    Publication date: Feb 2009

    Abstract:
    Extremely compact objects (9GM/4c2 < R <
    3GM/c2) contain trapped null geodesics. When such objects
    enter the evolution period corresponding to the geodetical motion of
    neutrinos, a certain part of neutrinos produced in their interior will
    be trapped influencing thus neutrino luminosity of the objects and
    consequently their thermal evolution. The existence of trapped neutrinos
    indicates possibility of ‚two-temperature‘ cooling regime of the
    extremely compact objects. We present upper estimates on the efficiency
    of the neutrino trapping effects obtained in the framework of the
    simplest model of the internal Schwarzschild spacetime with uniform
    distribution of energy density, assuming uniform distribution of
    neutrino emissivity. We introduce a ‚global‘ luminosity trapping
    coefficient representing influence of the trapping effect on the total
    neutrino luminosity of the extremely compact objects and cooling
    trapping coefficients of both ‚local‘ and ‚global‘ kinds characterizing
    influence of the trapping on the cooling process. It is shown that the
    trapping of neutrinos can be relevant to moderately or even slightly
    extremely compact objects.

    Authors:
    Stuchlík, Zdeněk; Török, Gabriel; Hledík, Stanislav; Urbanec, Martin;

    http://adsabs.harvard.edu/abs/2009CQGra..26c5003S

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