期刊
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
卷 44, 期 8-9, 页码 491-499出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1063773718090013
关键词
primordial black holes; accretion; early Universe; radiation-dominated stage
资金
- PRC CNRS/RFBR (2018-2020) [1985]
- RFBR (Russia) [18-52-15001 NCNI_a]
- research program Programme national de cosmologie et galaxies of the CNRS/INSU, France
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.
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