Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 54, p. 14-17 (2016)

Qualitative analysis of a cosmological evolution in a hydrodynamical model with a barotropic equation of state

V. Zhdanov, Dr. Sci., Prof.,
S. Dylda, stud. phys. fac.,
Taras Shevchenko National University of Kyiv

Abstract
We study a qualitative behavior of the scale factor and energy density in a hydrodynamical model of a homogeneous isotropic Universe with a general barotropic equation of state (EOS). We relax conditions on EOS as compared with the paper by Jenkovszky et al., [Phys. Rev. D 90, 023529 (2014)] and to include the cases of two or more points of zero specific enthalpy. We present a classification of possible scenarios with an asymptotically exponential inflation, analogs of the Big Rip in the future and in the past, singularity free bouncing solutions and oscillating Universes.

Keywords
Cosmological evolution

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