Results 151 to 160 of about 176,413 (293)
, 2005 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 ...
H. Bondi +9 more
core +1 more source
Cosmological gravitational waves from isocurvature fluctuations
AAPPS BulletinGravitational waves induced by large primordial curvature fluctuations may result in a sizable stochastic gravitational wave background. Interestingly, curvature fluctuations are gradually generated by initial isocurvature fluctuations, which in turn ...
Guillem Domènech
doaj +1 more source
Positrons from primordial black hole microquasars and gamma-ray bursts
Physics Letters B, 2019 We propose several novel scenarios how capture of small sublunar-mass primordial black holes (PBHs) by compact stars, white dwarfs or neutron stars, can lead to distinct short gamma-ray bursts (sGRBs) as well as microquasars (MQs).
Volodymyr Takhistov
doaj +1 more source
Waves from the centre: probing PBH and other macroscopic dark matter with LISA
European Physical Journal C: Particles and Fields, 2020 A significant fraction of cosmological dark matter can be formed by very dense macroscopic objects, for example primordial black holes. Gravitational waves offer a promising way to probe these kinds of dark-matter candidates, in a parameter space region ...
Florian Kühnel +3 more
doaj +1 more source
Neutron stars harboring a primordial black hole: Maximum survival time. [PDF]
Phys Rev D, 2021 Baumgarte TW, Shapiro SL.
europepmc +1 more source
CMB temperature trispectrum from accreting primordial black holes [PDF]
, 2022 Trey W. Jensen, Yacine Ali-Haïmoud
openalex +1 more source
CLASSICALITY OF PRIMORDIAL FLUCTUATIONS AND PRIMORDIAL BLACK HOLES
International Journal of Modern Physics D, 2001 The production of Primordial Black Holes (PBH) from inflationary perturbations provides a physical process where the effective classicality of the fluctuations does not hold for certain scales. For adiabatic perturbations produced during inflation, this range of scales corresponds to PBH with masses M≪1015 g.
openaire +2 more sources
Primordial black hole formation during slow-reheating: a review
Frontiers in Astronomy and Space SciencesIn this paper we review the possible mechanisms for the production of primordial black holes (PBHs) during a slow-reheating period in which the energy transfer of the inflaton field to standard model particles becomes effective at slow temperatures ...
Luis E. Padilla +4 more
doaj +1 more source
Effects of the merger history on the merger rate density of primordial black hole binaries
European Physical Journal C: Particles and Fields, 2019 We develop a formalism to calculate the merger rate density of primordial black hole binaries with a general mass function, by taking into account the merger history of primordial black holes.
Lang Liu, Zong-Kuan Guo, Rong-Gen Cai
doaj +1 more source
Primordial Black Hole: Mass and Angular Momentum Evolution
, 2008 The evolution of the primordial low mass black hole (PBH) in hot universe is considered. Increase of mass and decrease of PBH spin due to the accretion of radiation dominated matter are estimated with using of results of numerical simulation of PBH ...
A. G. Doroshkevich +12 more
core +1 more source