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Influence of the cosmological constant on gravitational lensing in small systems


Sereno, M (2008). Influence of the cosmological constant on gravitational lensing in small systems. Physical Review D, 77(4):043004.

Abstract

The cosmological constant Lambda affects gravitational lensing phenomena. The contribution of Lambda to the observable angular positions of multiple images and to their amplification and time delay is here computed through a study of the weak deflection limit of the equations of motion in the Schwarzschild–de Sitter metric. Because of Lambda the unresolved images are slightly demagnified, the radius of the Einstein ring decreases, and the time delay increases. The effect is however negligible for near lenses. In the case of a null cosmological constant, we provide some updated results on lensing by a Schwarzschild black hole

The cosmological constant Lambda affects gravitational lensing phenomena. The contribution of Lambda to the observable angular positions of multiple images and to their amplification and time delay is here computed through a study of the weak deflection limit of the equations of motion in the Schwarzschild–de Sitter metric. Because of Lambda the unresolved images are slightly demagnified, the radius of the Einstein ring decreases, and the time delay increases. The effect is however negligible for near lenses. In the case of a null cosmological constant, we provide some updated results on lensing by a Schwarzschild black hole

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Language:English
Date:February 2008
Deposited On:11 Mar 2009 16:30
Last Modified:05 Apr 2016 13:07
Publisher:American Physical Society
ISSN:1550-2368
Publisher DOI:10.1103/PhysRevD.77.043004
Related URLs:http://arxiv.org/abs/0711.1802
Permanent URL: http://doi.org/10.5167/uzh-16762

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