Cosmological Van Der Waals Model with Viscosity in an Inflationary Universe
| Autor: | V. V. Obukhov, A. V. Timoshkin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Inflation (cosmology) 010308 nuclear & particles physics Equation of state (cosmology) General Physics and Astronomy Astrophysics::Cosmology and Extragalactic Astrophysics Volume viscosity 01 natural sciences Gravitation General Relativity and Quantum Cosmology symbols.namesake Viscosity Theoretical physics 0103 physical sciences symbols van der Waals force Planck 010303 astronomy & astrophysics Scale factor (cosmology) |
| Zdroj: | Russian Physics Journal. 60:1705-1711 |
| ISSN: | 1573-9228 1064-8887 |
| Popis: | The evolution of the Universe in the early (inflationary) stage of its development in the spatially flat Friedmann–Lemaitre–Robertson–Walker metric is considered. A theoretical model, described by a van der Waals fluid with the effect of bulk viscosity taken into account is investigated. A solution of the gravitation equation for the energy density is found and an analytical expression for the scale factor has been obtained. To verify the reliability of the cosmological model, the inflation parameters, the spectral index, and the scalartensor ratio were calculated. A comparison of these parameters with data obtained from observations of the Planck satellites is carried out. Conditions for the applicability of the van der Waals model with viscosity to the description of an inflationary Universe are obtained. |
| Databáze: | OpenAIRE |
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