Scenario of a two-fluid FRW cosmological model with dark energy

Regular Article

DOI: 10.1140/epjp/i2017-11409-9

Cite this article as:
Tiwari, R.K., Beesham, A. & Shukla, B.K. Eur. Phys. J. Plus (2017) 132: 126. doi:10.1140/epjp/i2017-11409-9
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Abstract.

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., \(q=\alpha + \beta H\), which yields the scale factor \(a= e^{\frac{1}{\beta}\sqrt{2\beta t+k_{1}}}\), where \(k_{1}\) 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 \(\Lambda\) CDM model at late times.

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© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Department of Mathematics Govt. Model Science College RewaRewaIndia
  2. 2.Department of Mathematical SciencesUniversity of ZululandKwa-DlangezwaSouth Africa