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Bianchi Type-V Dark Energy Model with Varying EoS Parameter

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Abstract

Within the scope of an anisotropic Bianchi type-V cosmological model we have studied the evolution of the universe. The assumption of a diagonal energy-momentum tensor leads to some severe restriction on the metric functions, which on its part imposes restriction on the components of the energy momentum tensor. This model allows anisotropic matter distribution. Further using the proportionality condition that relates the shear scalar (σ) in the model with the expansion scalar (ϑ) and the variation law of Hubble parameter, connecting Hubble parameter with volume scale. Exact solution to the corresponding equations are obtained. The EoS parameter for dark energy as well as deceleration parameter is found to be the time varying functions. A qualitative picture of the evolution of the universe corresponding to different of its stages is given using the latest observational data.

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Acknowledgements

This work is supported in part by a joint Romanian-LIT, JINR, Dubna Research Project, theme no. 05-6-1060-2005/2013.

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  1. Laboratory of Information Technologies, Joint Institute for Nuclear Research, 141980, Dubna, Moscow region, Russia

    Bijan Saha

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  1. Bijan Saha
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Correspondence to Bijan Saha.

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Saha, B. Bianchi Type-V Dark Energy Model with Varying EoS Parameter. Int J Theor Phys 52, 1314–1325 (2013). https://doi.org/10.1007/s10773-012-1447-5

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  • DOI: https://doi.org/10.1007/s10773-012-1447-5

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