Black Hole in a Radiation-Dominated Universe

We study a black hole in an expanding Universe during the radiation-dominated stage. In particular, such a black hole may be of the primordial origin. In the case when the black hole radius is much smaller than the cosmological horizon, we found a self-consistent solution for the metric and the matt...

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Bibliographic Details
Published in:Astronomy letters 2018-08, Vol.44 (8-9), p.491-499
Main Authors: Babichev, E. O., Dokuchaev, V. I., Eroshenko, Yu. N.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Astroparticles
Big Bang theory
Black holes
Clumps
Dark matter
Deposition
Evolution
Observations and Techniques
Physics
Physics and Astronomy
Radiation
Universe
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Summary:We study a black hole in an expanding Universe during the radiation-dominated stage. In particular, such a black hole may be of the primordial origin. In the case when the black hole radius is much smaller than the cosmological horizon, we found a self-consistent solution for the metric and the matter distribution and its velocity far from the black hole. At distances much smaller than the cosmological horizon our solution coincides with the previously obtained solution for quasi-stationary accretion. Our results can be applied, in particular, for the formation of dark matter density spikes around primordial black holes, and for the evolution of dark matter clumps during the radiation-dominated stage.
ISSN:1063-7737
1562-6873
DOI:10.1134/S1063773718090013