Modified Chaplygin gas and constraints on its B parameter from cold dark matter and unified dark matter energy cosmological models |
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Authors: | P. Thakur S. Ghose B. C. Paul |
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Affiliation: | Physics Department, Alipurduar College, Jalpaiguri, 736122 West Bengal, India;Physics Department, North Bengal University, Darjeeling, 734 013 West Bengal, India |
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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 involves three parameters: B , A and α. The permitted values of these parameters are determined with the help of a dimensionless age parameter ( H 0 t 0) and H ( z ) − z data. Specifically, we study the allowed ranges of values of the B parameter in terms of α and As ( As is defined in terms of the parameters in the theory). We explore the constraints of the parameters in the cold dark matter and unified dark matter energy models, respectively. |
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Keywords: | dark matter |
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