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Advances in High Energy Physics
Volume 2014, Article ID 231452, 11 pages
http://dx.doi.org/10.1155/2014/231452
Research Article

FRW Cosmology with the Extended Chaplygin Gas

Physics Department, Istanbul Technical University, Istanbul, Turkey

Received 9 July 2014; Revised 3 September 2014; Accepted 5 September 2014; Published 15 September 2014

Academic Editor: Kadayam S. Viswanathan

Copyright © 2014 B. Pourhassan and E. O. Kahya. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

We propose extended Chaplygin gas equation of state for which it recovers barotropic fluid with quadratic equation of state. We use numerical method to investigate the behavior of some cosmological parameters such as scale factor, Hubble expansion parameter, energy density, and deceleration parameter. We also discuss the resulting effective equation of state parameter. Using density perturbations we investigate the stability of the theory.