Study of Inflationary Generalized Cosmic Chaplygin Gas for Standard and Tachyon Scalar Fields
General Relativity and Quantum Cosmology
2017-08-03 v2
Abstract
We consider an inflationary universe model in the context of generalized cosmic Chaplygin gas by taking matter field as standard and tachyon scalar fields. We evaluate the corresponding scalar fields and scalar potentials during intermediate and logamediate inflationary regimes by modifying the first Friedmann equation. In each case, we evaluate the number of e-folds, scalar as well as tensor power spectra, scalar spectral index and important observational parameter, i.e., tensor-scalar ratio in terms of inflatons. The graphical behavior of this parameter shows that the model remains incompatible with WMAP7 and Planck observational data in each case.
Keywords
Cite
@article{arxiv.1406.4169,
title = {Study of Inflationary Generalized Cosmic Chaplygin Gas for Standard and Tachyon Scalar Fields},
author = {M. Sharif and Rabia Saleem},
journal= {arXiv preprint arXiv:1406.4169},
year = {2017}
}
Comments
20 pages, 8 figures, Accepted for publication in EPJC