Neutrino Cooling of Primordial Hot Regions

Abstract

The effect of neutrino cooling of possible primary regions filled by the hot matter is discussed. Such regions could contain the primordial density inhomogeneities of different origin and survive up to modern epoch. We show that the final temperature of such region is $\sim 10\mathrm{keV}$ provided that the initial temperature is within the interval $10\mathrm{keV}...100\mathrm{MeV}$. The cooling is realized due to the nuclear reactions containing $n-p$ transition. The lower limit $10\mathrm{keV}$ is accounted for by suppression of the reactions rates because of threshold effect and $n$, $e^{\pm }$ density diminishment.

9 pages, 2 figures

References in corpus (5)

• The signature of primordial black holes in the dark matter halos of galaxies
• Early formation of galaxies initiated by clusters of primordial black holes
• Electromagnetic probes of primordial black holes as dark matter
• Clusters of Black Holes as Point-Like Gamma-ray Sources
• Electromagnetic Radiation Accompanying Gravitational Waves from Black Hole Binaries

Cited by in corpus (2)

• Hot primordial regions with anomalous hydrogenless chemical composition
• Interaction of domain walls with scalar particles in the early Universe