Observational Constraints on the Generalized Chaplygin Gas

Abstract

In this paper we study a quintessence cosmological model in which the dark energy component is considered to be the Generalized Chaplygin Gas and the curvature of the three-geometry is taken into account. Two parameters characterize this sort of fluid, the $\nu$ and the $\alpha$ parameters. We use different astronomical data for restricting these parameters. It is shown that the constraint $\nu \lesssim \alpha$ agrees enough well with the astronomical observations.

Accepted by IJMPD; 18 pages; 10 Figures

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• Constraints on the Generalized Chaplygin Gas Model from Gamma-Ray Bursts
• Generalized models of unification of dark matter and dark energy
• Cosmological evolution driven by polytropic fluids in an inhomogeneous spacetime