Bending of light in conformal Weyl gravity

Details Bending of light in conformal Weyl gravity Bending of light in conformal Weyl gravity

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010phrvd..81l7502s&link_type=abstract

Physical Review D, vol. 81, Issue 12, id. 127502

Physics

5

Modified Theories Of Gravity, Relativity And Gravitation, Gravitational Lenses And Luminous Arcs

Scientific paper

We reexamine the bending of light issue associated with the metric of the static, spherically symmetric solution of Weyl gravity discovered by Mannheim and Kazanas (1989). To this end we employ the procedure used recently by Rindler and Ishak to obtain the bending angle of light by a centrally concentrated spherically symmetric matter distribution in a Schwarzschild-de Sitter background. In earlier studies the term γr in the metric led to the paradoxical result of a bending angle proportional to the photon impact parameter, when using the usual formalism appropriate to asymptotically flat space-times. However, employing the approach of light bending of Rindler and Ishak we show that the effects of this term are in fact insignificant, with the discrepancy between the two procedures attributed to the definition of the bending angle between the asymptotically flat and nonflat spaces.

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