Constraints on dark energy from the lookback time versus redshift test

Details Constraints on dark energy from the lookback time versus redshift test Constraints on dark energy from the lookback time versus redshift test

2009-06-15

arxiv.org/abs/0906.2734v3

Phys.Lett.B693:509-514,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Physics Letters B in press. 15 pages, 6 figures, 1 table. Minor typos fixed

Scientific paper

We use lookback time versus redshift data from galaxy clusters (Capozziello et al., 2004) and passively evolving galaxies (Simon et al., 2005), and apply a bayesian prior on the total age of the Universe based on WMAP measurements, to constrain dark energy cosmological model parameters. Current lookback time data provide interesting and moderately restrictive constraints on cosmological parameters. When used jointly with current baryon acoustic peak and Type Ia supernovae apparent magnitude versus redshift data, lookback time data tighten the constraints on parameters and favor slightly smaller values of the nonrelativistic matter energy density.

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