Results 191 to 200 of about 176,413 (293)

Primordial black hole neutrinogenesis of sterile neutrino dark matter

open access: yesPhysics Letters B
Sterile neutrinos are well-motivated and actively searched for new particles that would mix with the active neutrinos. We study their phenomenology when they are produced in the evaporation of early Universe black holes, a novel production mechanism that
Muping Chen   +3 more
doaj   +1 more source

Magnetic monopole meets primordial black hole: an extended analysis

open access: yesEuropean Physical Journal C: Particles and Fields
We investigate gravitational capture of magnetic monopoles by primordial black holes (PBH) that evaporate before Big Bang Nucleosynthesis (BBN), a hypothetical process which was once proposed as an alternative solution to the monopole problem.
Chen Zhang, Xin Zhang
doaj   +1 more source

Primordial black hole-driven cosmic acceleration

open access: yesInternational Journal of Modern Physics D
In this paper, we propose a natural mechanism for cosmic acceleration driven by Primordial Black Holes (PBHs) with repulsive behavior, within a Swiss Cheese cosmological framework. Considering regular black hole spacetimes such as Hayward, Bardeen and Dymnikova as well as the singular Schwarzschild-de Sitter case we consistently find a robust PBH ...
Konstantinos F. Dialektopoulos   +2 more
openaire   +2 more sources

Gravitational Waves from Primordial Black Hole Dark Matter Spikes

open access: yesThe Astrophysical Journal
The origin of the binary black hole mergers observed by LIGO–Virgo–KAGRA remains an open question. We calculate the merger rate from primordial black holes (PBHs) within the density spike around supermassive black holes (SMBHs) at the centers of galaxies.
Wei-Xiang Feng, Simeon Bird, Hai-Bo Yu
doaj   +1 more source

Home - About - Disclaimer - Privacy