Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Eroshenko, Yury"'
Autor:
Eroshenko, Yury N.
Publikováno v:
JCAP 08, 019 (2024)
At the cosmological stage of radiation dominance, dark matter density spikes should form around primordial black holes. In the case when dark matter particles are able to annihilate, the density in the central regions of the spikes decreases due to t
Externí odkaz:
http://arxiv.org/abs/2407.10225
Autor:
Eroshenko, Yury N.
The structure of the sound waves generated in baryonic gas during the evolution of dark matter halos with masses less than the Jeans mass is calculated. In this case, the source of the gravitational field that creates the wave can be either at a line
Externí odkaz:
http://arxiv.org/abs/2312.05374
Autor:
Eroshenko, Yury N.
Publikováno v:
Chinese Physics C 48, 015104 (2024)
The influence of intergalactic magnetic fields on the strong gravitational lensing of blazar secondary gamma radiation is discussed. Currently, two cases of strong gravitational lensing of blazar gamma-radiation are known, where radiation is deflecte
Externí odkaz:
http://arxiv.org/abs/2311.01207
Autor:
Eroshenko, Yury N.
Publikováno v:
New Astronomy 103, 102057 (2023)
The capture of the free-floating planets and primordial black holes into a collapsing protostellar cloud is considered. Although the last stage of rapid contraction leading to the star formation lasts for a relatively short time $\sim 10^5$ years, du
Externí odkaz:
http://arxiv.org/abs/2303.05200
Autor:
Eroshenko, Yury, Stasenko, Viktor
Publikováno v:
Symmetry 15, 637 (2023)
The orbital evolution of a binary system consisting of two primordial black hole clusters is investigated. Such clusters are predicted in some theoretical models with broken symmetry in the inflation Lagrangian. A cluster consists of the most massive
Externí odkaz:
http://arxiv.org/abs/2302.05167
Autor:
Eroshenko, Yury N.
Publikováno v:
Int. J. Mod. Phys. A 38, 2350016 (2023)
In this paper, a class of the warp drive (WD) type metrics is proposed in the form of spherical and plane waves or shells. In particular, these metrics can describe the passage of spherical WD through the horizon of a black hole from the inside out.
Externí odkaz:
http://arxiv.org/abs/2210.17468
Autor:
Eroshenko, Yury N.
Publikováno v:
JCAP 12, 041 (2021)
The angular momentum (spin) acquisition by a collapsing domain wall at the cosmological radiation-dominated stage is investigated. During the collapses, primordial black holes and their clusters can be born in various mass ranges. Spin accumulation o
Externí odkaz:
http://arxiv.org/abs/2111.03403
Publikováno v:
JCAP11(2021)053
We investigated the possibility of construction the homogeneous and isotropic cosmological solutions in Weyl geometry. We derived the self-consistency condition which ensures the conformal invariance of the complete set of equations of motion. There
Externí odkaz:
http://arxiv.org/abs/2107.06160
Autor:
Eroshenko, Yury
Publikováno v:
Physics of the Dark Universe 32, 100833 (2021)
We consider a cosmological model with dark matter in the form of $\sim10^{-12}M_\odot$ primordial black holes in dense weakly relativistic clusters with masses $18-560M_\odot$. It is shown that during the multiple collisions of the black holes the $\
Externí odkaz:
http://arxiv.org/abs/2105.03704
Publikováno v:
Phys. Rev. D 104, 043005 (2021)
We explore the inflationary dynamics leading to formation of closed domain walls in course of evolution of an axion like particle (ALP) field whose Peccei-Quinn-like phase transition occurred well before inflationary epoch. Evolving after inflation,
Externí odkaz:
http://arxiv.org/abs/2104.08750