Results 131 to 140 of about 38,497 (193)

Primordial black holes in cosmological simulations: growth prospects for supermassive black holes

The Open Journal of Astrophysics
It 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, John A Regan, Daxal Mehta, Peter Coles, Pratika Dayal   +4 more
doaj   +1 more source

Determining the spin of light primordial black holes with Hawking radiation. Part II. High spin regime

Journal of High Energy Physics
We 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
doaj   +1 more source

Dark spiky primordial black holes

Physical Review D
11 pages, 1 figure; matches published ...
openaire   +2 more sources

Primordial Black Holes in the Solar System

The Astrophysical Journal
If 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
doaj   +1 more source

Primordial black holes as cosmic expansion accelerators

Physics Letters B
We 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, Theodoros Papanikolaou, Vasilios Zarikas   +2 more
doaj   +1 more source

Large fluctuations and primordial black holes

Physics Reports
In this paper, we review in detail different mechanisms of generation of large primordial fluctuations and their implications for the production of primordial black holes (PBHs) and scalar-induced secondary gravity waves (SIGW), with the ultimate aim of understanding the impact of loop correction on quantum correlations and the power spectrum.
Choudhury, Sayantan, Sami, M.
openaire   +2 more sources

Primordial black holes are true vacuum nurseries

Physics Letters B
The 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, Lucien Heurtier, Shi-Qian Hu, Andrew Cheek   +3 more
doaj   +1 more source

Quantum-mechanical Suppression of Accretion by Primordial Black Holes

The Astrophysical Journal Letters
The Schwarzschild radii of primordial black holes (PBHs) in the mass range of 6 × 10 ^14 –4 × 10 ^19 g match the sizes of nuclei to atoms. I discuss the resulting quantum-mechanical suppression in the accretion of matter by PBHs in dense astrophysical ...
Abraham Loeb
doaj   +1 more source

Primordial black holes and the origin of the matter-antimatter asymmetry. [PDF]

Philos Trans A Math Phys Eng Sci, 2019
García-Bellido J.
europepmc   +1 more source

Perspectives on fundamental cosmology from Low Earth Orbit and the Moon. [PDF]

NPJ Microgravity, 2023
Bertone G, Buchmueller OL, Cole PS.
europepmc   +1 more source