Constraints on dark energy from the lookback time versus redshift test |
| |
Authors: | Lado Samushia Abha Dev Deepak Jain Bharat Ratra |
| |
Institution: | 1. Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506, USA;2. National Abastumani Astrophysical Observatory, Ilia Chavchavadze University, 2A Kazbegi Ave, Tbilisi GE-0160, Georgia;3. Miranda House, University of Delhi, Delhi 110 007, India;4. Deen Dayal Upadhyaya College, University of Delhi, New Delhi 110 015, India |
| |
Abstract: | We use lookback time versus redshift data from galaxy clusters (Capozziello et al., 2004 9]) and passively evolving galaxies (Simon et al., 2005 62]), 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. |
| |
Keywords: | Cosmological parameters Galaxies general Galaxies clusters general Galaxies clusters ages |
本文献已被 ScienceDirect 等数据库收录! |
|