Results 1 to 10 of about 2,200,433 (156)

Primordial black holes at the junction

Journal of High Energy Physics
Primordial black holes (PBHs) formed during first-order phase transitions provide a powerful link between the early-universe microphysics and observable signatures today, including dark matter and gravitational waves.
James B. Dent, Bhaskar Dutta, Mudit Rai
doaj   +1 more source

Primordial black holes from first-order cosmological phase transitions

Physics Letters B
We discuss the possibility of forming primordial black holes during a first-order phase transition in the early Universe. As is well known, such a phase transition proceeds through the formation of true-vacuum bubbles in a Universe that is still in a ...
Michael J. Baker, Moritz Breitbach, Joachim Kopp, Lukas Mittnacht   +3 more
doaj   +1 more source

Galaxy Formation from the Primordial Black Holes

EPJ Web of Conferences, 2017
Supermassive black hole (SMBH) of size MBH = 106-10M⊙ is common in the Universe and it defines the center of the galaxy. A galaxy and the SMBH are generally thought to have co-evolved.
Morikawa Masahiro
doaj   +1 more source

Clusters of PBHs in a Framework of Multidimensional f(R)-Gravity

Particles
We investigate primordial black hole (PBH) production via the collapse of supercritical domain walls in a quadratic f(R)-gravity model with tensor extensions.
Maxim Krasnov, Valery Nikulin
doaj   +1 more source

Non-canonical inflation and primordial black holes production

Physics Letters B, 2019
We study a mechanism for the amplification of the inflationary scalar perturbation when the inflaton field action is non-canonical, i.e. the inflaton kinetic term has a non-standard form.
Alexander Y. Kamenshchik, Alessandro Tronconi, Tereza Vardanyan, Giovanni Venturi   +3 more
doaj   +1 more source

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

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
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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
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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