科研之友
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摘要
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 alpha = e(1/beta) (root 2 beta t+k1), 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.
- 出版日期2017-3-15
