Cosmological Constraints from Hubble Parameter versus Redshift Data

Details Cosmological Constraints from Hubble Parameter versus Redshift Data Cosmological Constraints from Hubble Parameter versus Redshift Data

2006-07-13

arxiv.org/abs/astro-ph/0607301v2

Astrophys.J.650:L5-L8,2006

Astronomy and Astrophysics

Astrophysics

Minor changes, including an estimate for H_0. ApJL, in press

Scientific paper

10.1086/508662

We use the Simon, Verde, & Jimenez (2005) determination of the redshift dependence of the Hubble parameter to constrain cosmological parameters in three dark energy cosmological models. We consider the standard $\Lambda$CDM model, the XCDM parameterization of the dark energy equation of state, and a slowly rolling dark energy scalar field with an inverse power-law potential. The constraints are restrictive, consistent with those derived from Type Ia supernova redshift-magnitude data, and complement those from galaxy cluster gas mass fraction versus redshift data.

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