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

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.

Cosmological evolution

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DOI: https://doi.org/10.17721/BTSNUA.2016.54.14-17