paper

Anisotropic cosmological dynamics in gravity in the presence of a perfect fluid

arXiv:1907.12538 · doi:10.1140/epjc/s10052-019-7251-0

Abstract

We consider the cosmological evolution of a flat anisotropic Universe in gravity in the presence of a perfect fluid. It is shown that the matter content of the Universe has a significant impact of the nature of a cosmological singularity in the model studied. Depending on the parameters of the function and the equation of state of the perfect fluid in question the well-known Kasner regime of general relativity can be replaced by a new anisotropic solution, or by an isotropic regime, or the cosmological singularity changes its nature to a non-standard one with a finite values of Hubble parameters. Six possible scenarios of the cosmological evolution for the model studied have been found numerically.

18 pages, 6 figures, some corrections, published version

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