The effect of curvature in thawing models

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, $w_{\varphi }$, as a function of the scale factor $a$, for the case in which the scalar field $\varphi$ evolve in nearly flat scalar potential. We show that all such models provide the corresponding approximate analytical expressions for $w_{\varphi }({\Omega }_{\varphi },{\Omega }_k)$ and $w_{\varphi }(a)$. We present observational constraints on these models.

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

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• Observational constraints on a cosmological model with Lagrange multipliers