Scenario of a two-fluid FRW cosmological model with dark energy
Department of Mathematics Govt. Model Science College Rewa, Rewa, madhya pradesh, India
2 Department of Mathematical Sciences, University of Zululand, 3886, Kwa-Dlangezwa, South Africa
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Accepted: 13 February 2017
Published online: 15 March 2017
In this paper we carry out an investigation of the equation of state parameter for dark energy in the spatially homogeneous and isotropic Friedmann-Robertson-Walker (FRW) model with barotropic fluid and dark energy. To get a deterministic model, we have assumed that the deceleration parameter (q) is a linear function of the Hubble parameter (H), i.e., , which yields the scale factor , where is constant. The equation of state parameter for dark energy is a decreasing function of cosmic time in both interacting and non-interacting cases, and is always varying in the quintessence region for all cases. We have also discussed the jerk parameter for our models, and its value approaches that of the CDM model at late times.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2017