caa a22 4500 445386649 CHVBK 20180317143034.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10714-011-1186-6 doi (NATIONALLICENCE)springer-10.1007/s10714-011-1186-6 The cosmological constant and the gravitational light bending [Elektronische Daten] [Tolu Biressa, J. de Freitas Pacheco] The solution of the null non-radial geodesic in a Schwarzschild-de Sitter background is revisited. The gravitational bending of a light ray is affected by the cosmological constant, in agreement with the findings of some previous investigations. The present study confirms that the leading correction term depends directly not only on Λ but also on the impact parameter and on the angular distance to the source. Using the resulting lens equation, the projected mass of the lens was estimated for several systems displaying Einstein rings. Corrections on the masses due to Λ are, on the average, of the order of 2%, indicating that they are not completly negligible for lens systems at cosmological distances. Springer Science+Business Media, LLC, 2011 Gravitational lenses nationallicence Cosmological constant nationallicence Schwarzschild-de Sitter metric nationallicence Biressa Tolu Department of Physics, University of Addis Ababa, P.O. Box 1176, Addis Ababa, Ethiopia aut de Freitas Pacheco J. Observatoire de la Côte d'Azur, Université de Nice-Sophia Antipolis, BP 4229, 06304, Nice Cedex 4, France aut General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/10(2011-10-01), 2649-2659 0001-7701 43:10<2649 2011 43 10714 https://doi.org/10.1007/s10714-011-1186-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10714-011-1186-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Biressa Tolu Department of Physics, University of Addis Ababa, P.O. Box 1176, Addis Ababa, Ethiopia aut NATIONALLICENCE 700 1- de Freitas Pacheco J. Observatoire de la Côte d'Azur, Université de Nice-Sophia Antipolis, BP 4229, 06304, Nice Cedex 4, France aut NATIONALLICENCE 773 0- General Relativity and Gravitation Springer US; http://www.springer-ny.com 43/10(2011-10-01), 2649-2659 0001-7701 43:10<2649 2011 43 10714 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer