Volume 484, Number 1, June II 2008
|Page(s)||103 - 106|
|Section||Cosmology (including clusters of galaxies)|
|Published online||08 April 2008|
Cosmological constant and time delay
Centre de Physique Théorique, CNRS-Luminy, Case 907, 13288 Marseille Cedex 9, France Unité Mixte de Recherche (UMR 6207) du CNRS et des Universités Aix-Marseille 1 et 2 et Sud Toulon-Var, Laboratoire affilié à la FRUMAM (FR 2291); also at Université de Provence, France e-mail: firstname.lastname@example.org
2 Laboratoire de Physique Théorique, Université Mentouri, 25000 Constantine; also at Université M'Hamed Bouguerra, 35000 Boumerdes, Algeria e-mail: email@example.com
Accepted: 22 March 2008
Aims. The effect of the cosmological constant on the time delay caused by an isolated spherical mass is calculated.
Methods. We integrate the geodesic equations without using the lens equation.
Results. We compare our results to a recent observational bound on the time delay of the lensed quasar SDSS J1004+4112.
Key words: cosmology: theory
© ESO, 2008
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