Light Bending as a Probe of the Nature of Dark Energy

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dc.creatorFinelli, Fabio
dc.creatorGalaverni, Matteo
dc.creatorGruppuso, Alessandro
dc.date2006-01-03
dc.date2007-02-12
dc.date.accessioned2026-07-07T11:03:55Z
dc.date.available2026-07-07T11:03:55Z
dc.descriptionWe study the bending of light for static spherically symmetric (SSS) space-times which include a dark energy contribution. Geometric dark energy models generically predict a correction to the Einstein angle written in terms of the distance to the closest approach, whereas a cosmological constant $Λ$ does not. While dark energy is associated with a repulsive force in cosmological context, its effect on null geodesics in SSS space-times can be attractive as for the Newtonian term. This dark energy contribution may be not negligible with respect to the Einstein prediction in lensing involving clusters of galaxies. Strong lensing may therefore be useful to distinguish $Λ$ from other dark energy models.
dc.description5 pages, 2 figures, 1 table. References added, final version appeared in Physical Review D
dc.identifierhttps://arxiv.org/abs/astro-ph/0601044
dc.identifierhttp://arxiv.org/abs/astro-ph/0601044
dc.identifierPhys.Rev.D75:043003,2007
dc.identifierdoi:10.1103/PhysRevD.75.043003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188713
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleLight Bending as a Probe of the Nature of Dark Energy
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