Publikationsdatum:
2015-05-20
Beschreibung:
In this paper, we study the effects of bulk viscous pressure on warm inflationary modified Chaplygin gas model using Friedmann Robertson Walker (FRW) background. Inflaton and imperfect fluid (matter-radiation) are assumed to be the matter contents of the universe. We develop the present model during intermediate era and evaluate inflaton fields, effective potentials and entropy density for variable as well as constant dissipation and bulk viscous coefficients in high dissipative regime. In order to discuss inflationary perturbations, we constraint scalar (tensor) power spectra, their corresponding spectral indices, tensor–scalar ratio and running of spectral index using recent observations. The graphical analysis of these perturbed parameters shows that the viscous inflationary model remains compatible with Wilkinson Microwave Anisotropy Probe 7 and Planck probe.
Print ISSN:
0035-8711
Digitale ISSN:
1365-2966
Thema:
Physik
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