Zobrazeno 1 - 10
of 156
pro vyhledávání: '"Tkachev, I. I."'
We analytically solve the problem of Bose star growth in the bath of gravitationally interacting particles. We find that after nucleation of this object the bath is described by a self-similar solution of kinetic equation. Together with the conservat
Externí odkaz:
http://arxiv.org/abs/2305.01005
Publikováno v:
Phys. Rev. D 104, 023504 (2021)
Light bosonic (axion-like) dark matter may form Bose stars - clumps of nonrelativistic Bose-Einstein condensate supported by self-gravity. We study rotating Bose stars composed of condensed particles with nonzero angular momentum $l$. We analytically
Externí odkaz:
http://arxiv.org/abs/2104.00962
Publikováno v:
Astrophysical Journal 925, 109 (2022)
We advance theoretical methods for studying propagation effects in the Fast Radio Burst (FRB) spectra. We derive their autocorrelation function in the model with diffractive lensing and strong Kolmogorov-type scintillations and analytically obtain th
Externí odkaz:
http://arxiv.org/abs/2010.15145
Publikováno v:
Phys. Rev. D 102, 023501 (2020)
We study parametric instability of compact axion dark matter structures decaying to radiophotons. Corresponding objects - Bose (axion) stars, their clusters, and clouds of diffuse axions - form abundantly in the postinflationary Peccei-Quinn scenario
Externí odkaz:
http://arxiv.org/abs/2004.05179
Akademický článek
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Publikováno v:
Phys. Rev. Lett. 121, 151301 (2018)
We study Bose-Einstein condensation and formation of Bose stars in the virialized dark matter halos/miniclusters by universal gravitational interactions. We prove that this phenomenon does occur and it is described by kinetic equation. We give expres
Externí odkaz:
http://arxiv.org/abs/1804.05857
Publikováno v:
JETP 125, 434 (2017)
Previously, it has been established that axion dark matter (DM) is clustered to form clumps (axion miniclusters) with masses $M\sim10^{-12}M_\odot$. The passages of such clumps through the Earth are very rare events occurring once in $10^5$ years. It
Externí odkaz:
http://arxiv.org/abs/1710.09586
Autor:
Abdurashitov, J. N., Belesev, A. I., Chernov, V. G., Geraskin, E. V., Golubev, A. A., Grigorieva, P. V., Koroteev, G. A., Likhovid, N. A., Nozik, A. A., Pantuev, V. S., Parfenov, V. I., Skasyrskaya, A. K., Tkachev, I. I., Zadorozhny, S. V.
We present the first measurements of tritium beta-decay spectrum in the electron energy range 16-18.6 keV. The goal is to find distortions which may correspond to the presence of a heavy sterile neutrinos. A possible contribution of this kind would m
Externí odkaz:
http://arxiv.org/abs/1703.10779
Publikováno v:
Phys. Rev. Lett. 118, 011301 (2017)
The substructures of light bosonic (axion-like) dark matter may condense into compact Bose stars. We study collapses of the critical-mass stars caused by attractive self-interaction of the axion-like particles and find that these processes proceed in
Externí odkaz:
http://arxiv.org/abs/1609.03611
Akademický článek
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