Results 131 to 140 of about 38,917 (207)
The primordial black hole mass range [PDF]
Modern Physics Letters A, 2016 We investigate Primordial Black Hole (PBH) formation by which we mean black holes produced in the early Universe during radiation domination. After discussing the range of PBH mass permitted in the original mechanism of Carr and Hawking, hybrid inflation with parametric resonance is presented as an existence theorem for PBHs of arbitrary mass.
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Primordial black holes in cosmological simulations: growth prospects for supermassive black holes
The Open Journal of AstrophysicsIt has long been suggested that a fraction of the dark matter in the Universe could exist in the form of primordial black holes (PBHs) that have existed since the radiation dominated era.
Lewis R Prole +4 more
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Angular Momentum of Dark Matter Black Holes
, 2016 The putative black holes which may constitute all the dark matter are described by a Kerr metric with only two parameters, mass M and angular momentum J. There has been little discussion of J since it plays no role in the upcoming attempt at detection by
Frampton, Paul H.
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Cosmology with primordial black holes
, 2003 Some aspects of Cosmology with primordial black holes are briefly ...
Barrau, Aurelien, Boudoul, Gaelle
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Black holes and Higgs stability
, 2016 We study the effect of primordial black holes on the classical rate of nucleation of AdS regions within the standard electroweak vacuum. We find that the energy barrier for transitions to the new vacuum, which characterizes the exponential suppression of
A. Kobakhidze +6 more
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Journal of High Energy PhysicsWe propose a method to determine the mass and spin of primordial black holes based on measuring the energy and emission rate at the dipolar and quadrupolar peaks in the primary photon Hawking spectrum, applicable for dimensionless spin parameters a ~ $$ \
Marco Calzà, João G. Rosa
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Primordial black holes and the first stars
Physical Review DPrimordial black holes (PBHs) constitute a compelling dark matter candidate whose gravitational effects could significantly influence early cosmic structure formation. We investigate the impact of PBHs on Population III star formation through detailed $N$-body and hydrodynamic simulations, extending beyond previous semi-analytical approaches.
Julia Monika Koulen +2 more
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Primordial black holes as cosmic expansion accelerators
Physics Letters BWe propose a novel and natural mechanism for cosmic acceleration driven by primordial black holes (PBHs) exhibiting repulsive behavior. Using a new “Swiss Cheese” cosmological approach, we demonstrate that this cosmic acceleration mechanism is a general ...
Konstantinos Dialektopoulos +2 more
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Primordial Black Holes in the Solar System
The Astrophysical JournalIf primordial black holes (PBHs) of asteroidal mass make up the entire dark matter, they could be detectable through their gravitational influence in the solar system.
Valentin Thoss, Andreas Burkert
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Primordial black holes are true vacuum nurseries
Physics Letters BThe Hawking evaporation of primordial black holes (PBH) reheats the Universe locally, forming hot spots that survive throughout their lifetime. We propose to use the temperature profile of such hot spots to calculate the decay rate of metastable vacua in
Louis Hamaide +3 more
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