2015/02/04 by E. O. Kahya, B. Pourhassan · 2 citations
Physics and Astronomy · #gr-qc #hep-th
paper · pdf · doi:10.1142/s0217732315500704
published as Modern Physics Letters A Vol. 30, No. 13 (2015) 1550070 · 17 pages. Accepted in MPLA
arxiv created 2015/02/04 · arxiv updated 2015/04/01
In this paper, we consider a universe dominated by the extended Chaplygin gas which recently proposed as the last version of Chaplygin gas models. Here, we only consider the second order term which recovers quadratic barotropic fluid equation of state. The density perturbations analyzed in both relativistic and Newtonian regimes and show that the model is stable without any phase transition and critical point. We confirmed stability of the model using thermodynamics point of view.