Scalar field descriptions of two dark energy models

2017/06/30 by G. Panotopoulos · 1 citation
Physics and Astronomy · #astro-ph.CO

paper · pdf · doi:10.1103/physrevd.96.023520

Revtex, 11 pages, 10 figures, to be published in PRD

arxiv created 2017/06/30 · arxiv updated 2017/08/02

Abstract

We give a scalar field description of two dark energy parameterizations, and we analyze in detail its cosmology both at the level of background evolution and at the level of linear perturbations. In particular, we compute the statefinder parameters and the growth index as functions of the red-shift for both dark energy parameterizations, and the comparison with the ΛCDM model as well as with a few well-known geometrical dark energy models is shown. In addition, the combination parameter A=f σ₈ of both models is compared against current data.

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