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arXiv · 0905.2281

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

P. Thakur·S. Ghose·B. C. Paul
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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 ρ- \frac {A}{ρ^α} $) involves three parameters: $B$, $A$ and $α$. 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 $α$ 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.

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P. Thakur, S. Ghose, B. C. Paul. 2009-08-19. Modified Chaplygin Gas and Constraints on its B parameter from CDM and UDME Cosmological models. https://doi.org/10.1111/j.1365-2966.2009.15015.x

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