Modified Chaplygin Gas and Constraints on its B parameter from CDM and UDME Cosmological models - Astrophysics > Cosmology and Nongalactic Astrophysics

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Abstract: We study Modified Chaplygin Gas MCG as a candidate for dark energy andpredict the values of parameters of the gas for a physically viablecosmological model. The equation of state of MCG $p=B ho - \frac{A}{ ho^\alpha}$ involves three parameters: $B$, $A$ and $\alpha$. Thepermitted values of these parameters are determined with the help ofdimensionless age parameter $H {o}t {o}$ and $Hz-z$ Data. Specifically westudy 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. Weexplore the constraints of the parameters in Cold Dark MatterCDM model andUDMEUnified Dark Matter Energy model respectively.

Autor: P. Thakur, S. Ghose, B. C.Paul

Fuente: https://arxiv.org/