1302.2911 (Prabir Rudra)

Is Generalized Cosmic Chaplygin gas a much less constrained form of dark
energy?    [PDF]

Prabir Rudra

In this paper we investigate the role played by dark energy in the form of Generalized cosmic Chaplygin gas in an accelerating universe described by FRW cosmology. We have tried to describe the model from the theoretical point of view of a field, by introducing a scalar field $\phi$ and a self interacting potential $V(\phi)$. The corresponding expressions for the field are obtained for the given model. Statefinder parameters have been used to characterize the dark energy model. Plots have been generated for characterizing different phases of universe diagrammatically and a comparative study is performed with the Modified Chaplygin gas model. As an outcome of the study, Generalized cosmic Chaplygin gas is identified as a much less constrained form of dark energy.

View original: http://arxiv.org/abs/1302.2911