Modified Chaplygin Gas and Constraints on its B parameter from CDM and UDME Cosmological models

Abstract

We study Modified Chaplygin Gas (MCG) as a candidate for dark energy and predict the values of parameters of the gas for a physically viable cosmological model. The equation of state of MCG ($p=B\rho -\frac{A}{{\rho }^{\alpha }}$) involves three parameters: $B$, $A$ and $\alpha$. The permitted values of these parameters are determined with the help of dimensionless age parameter ($H_o{t}_o$) and $H(z)-z$ Data. Specifically we study the allowed ranges of values of B parameter in terms of $\alpha$ and $A_s$ ($A_s$ is defined in terms of the constants in the theory). We explore the constraints of the parameters in Cold Dark Matter(CDM) model and UDME(Unified Dark Matter Energy) model respectively.

5 pages, 10 figs

References in corpus (1)

• Gamma-ray bursts as dark energy-matter probes in the context of the generalized Chaplygin gas model

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