XXth International Conference on Neutrino Physics and Astrophysics
S.E.Yuralevich
New Possible Source of Huge Neutrino Bursts
We predict that white dwarf (WD) matter absorption by a primordial
black hole (PBH) can give rise to abundant neutrino emission. It is
shown that PBH of masses M > 5x10^14 g are able to absorb WD completely
for the time of their existence, giving rise to formation of black holes
of WD mass. Neutrino emission accompanies the neutronization caused by
the accreting WD matter compression. The duration of the neutrino burst
accompanying the final stage of WD absorption will not considerably
exceed the free fall time (> 0.1 s). The total neutrino burst energy can
reach 10^52 erg in case of WD central density equal to 10^9 g/cm^3.
Unlike the supernova explosion, the predicted neutrino burst is
accompanied by neither antineutrino nor ? and ? neutrino emission. If
such a burst occurs at the typical distance of 10 kpc it may cause up
to 50 events of ? scattering in the Super-Kamiokande detector. The
predicted mechanism of neutrino emission can give fifteen orders higher
contribution to the diffuse cosmic neutrino flux than the PBH Hawking
neutrino radiation.
Based on
S.E.Juralevich & V.V.Tikhomirov,
astro-ph/0202445