Observational $H(z)$ Data and Cosmological Models

Details Observational $H(z)$ Data and Cosmological Models Observational $H(z)$ Data and Cosmological Models

2006-09-21

arxiv.org/abs/astro-ph/0609597v3

Phys.Lett. B644 (2007) 7-15

Astronomy and Astrophysics

Astrophysics

14 pages, Latex2e; v2: discussions and references added, Phys. Lett. B in press; v3: published version

Scientific paper

10.1016/j.physletb.2006.11.027

In this work, we confront ten cosmological models with observational $H(z)$ data. The possible interaction between dark energy and dust matter is allowed in some of these models. Also, we consider the possibility of (effective) equation-of-state parameter (EoS) crossing -1. We find that the best models have an oscillating feature for both $H(z)$ and EoS, with the EoS crossing -1 around redshift $z\sim 1.5$.

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