Warm-Polytropic Cosmology with and Without Bulk Viscosity |
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Authors: | Hassan Saadat |
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Institution: | 1. Department of Physics, Shiraz Branch, Islamic Azad University, P.O. Box 71555-477, Shiraz, Iran
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Abstract: | In this paper we consider warm-polytropic cosmology including bulk viscosity and study cosmological parameters. We can obtain effect of viscosity on the important cosmological parameters such as Hubble expansion, deceleration and scale factor parameters. We compare our results with observational data and fix our solution. We find that the bulk viscosity increases both energy density and Hubble expansion parameter. |
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