Constraints on a quintessence model from gravitational lensing statistics

Details Constraints on a quintessence model from gravitational lensing statistics Constraints on a quintessence model from gravitational lensing statistics

2004-10-19

arxiv.org/abs/astro-ph/0410441v1

Mon.Not.Roy.Astron.Soc. 356 (2005) 937-943

Astronomy and Astrophysics

Astrophysics

8 pages, 6 figures; this is a preprint of an Article accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2004.08507.x

Constraints on an exact quintessence scalar-field model with an exponential potential are derived from gravitational lens statistics. An exponential potential can account for data from both optical quasar surveys and radio selected sources. Based on the Cosmic Lens All-Sky Survey (CLASS) sample, lensing statistics provides, for the pressureless matter density parameter, an estimate of Omega_{M0} = 0.31(-0.14)(+0.12).

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