arXiv subjects

V. V. Tikhomirov

Publications and source records attributed to V. V. Tikhomirov.

20 records · Page 2Linked to original sources

arXiv2005

How particle collisions increase the rate of accretion from the cosmological background onto primordial black holes in braneworld cosmology

It is shown that, contrary to the widespread opinion, particle collisions considerably increase accretion rate from the cosmological background onto 5D primordial black holes formed during the high-energy phase of the Randall-Sundrum Type II braneworld scenario. Increase of accretion rate leads to much tighter constraints on initial primordial black hole mass fraction imposed by the critical density limit and measurements of high-energy diffuse photon background and antiproton excess.

astro-ph↗

arXiv2002

New possible source of huge neutrino bursts

It is shown that primordial black holes (PBHs) of masses M > 5x10^14 g are able to absorb white dwarfs (WD) completely for the time of their existence, giving rise to formation of black holes of WD mases. The WD absorption is accompanied by up to 10^{52}erg neutrino bursts which could both considerably contribute to the cosmic neutrino flux and open up a new way of PBHs detection, especially effective in placing new constraints on abundance of nonevaporating PBHs with masses M >> 10^15 g.

astro-ph↗