Neutrino cooling effect of primordial hot areas in dependence on its size
Abstract
We consider the temperature dynamics of hypothetical primordial hot areas in the Universe. Such areas can be produced by the primordial density inhomogeneities and can survive to the modern era, in particular due to primordial black hole (PBH) cluster of size R 1 pc and more. Here we concentrate on the neutrino cooling effect which is realized due to reactions of weak p n transitions and e annihilation. The given neutrino cooling mechanism is found to work in a wide range of parameters. For those parameters typical for PBH cluster considered, the cooling mechanism is quite valuable for the temperatures T 3 MeV.
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