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paper

The effect of curvature in thawing models

arXiv:1010.2477 · doi:10.1016/j.physletb.2010.10.009

Abstract

We study the evolution of spatial curvature for thawing class of dark energy models. We examine the evolution of the equation of state parameter, $w_ϕ$, as a function of the scale factor $a$, for the case in which the scalar field $ϕ$ evolve in nearly flat scalar potential. We show that all such models provide the corresponding approximate analytical expressions for $w_ϕ(Ω_ϕ,Ω_k)$ and $w_ϕ(a)$. We present observational constraints on these models.

14 pages, 6 figures. Accepted for publication in Phys. Lett. B