Dynamics of Bianchi V anisotropic model with perfect fluid and scalar field

Abstract

The paper deals with the dynamical evolution of a homogeneous and anisotropic Bianchi V model filled with perfect fluid and scalar field. The two sources are assumed to be non-interacting. The average scale factor and scalar potential are assumed to be the exponential functions of the scalar field. After constructing the scenario, the exact solutions of the field equations are obtained. We use the observational data in order to find the parameters \(\alpha\) and β, used in average scale factor and scalar potential, respectively. The roles of scalar field through the variable equation of state (EoS) parameters are studied in detail. We observe that during the evolution of the Universe the EoS parameters change from phantom region to quintessence region for some small values of \(\alpha\) and β, respectively. This implies that the model shows phantom behaviour during early time and quintessence in late time evolution. However, for the large values of \(\alpha\) and β these EoS parameters vary in quintessence region only in both cases. We also find the statefinder parameters which shows that the model behaves like \(\Lambda\) CDM or SCDM depending on the constant values of \(\alpha\) and β.

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