Influence of the cosmological constant on gravitational lensing in small systems

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.043004· OSTI ID:21039083

Sereno, Mauro ^[1]

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1. Institut fuer Theoretische Physik, Universitaet Zuerich, Winterthurerstrasse 190, CH-8057 Zurich (Switzerland)

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.

• OSTI ID: 21039083
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
BLACK HOLES
COSMOLOGICAL CONSTANT
COSMOLOGICAL MODELS
COSMOLOGY
DE SITTER GROUP
EQUATIONS OF MOTION
IMAGES
SCHWARZSCHILD METRIC
TIME DELAY