A Geometrical Approach to Strong Gravitational Lensing in f(R) Gravity

Details A Geometrical Approach to Strong Gravitational Lensing in f(R) Gravity A Geometrical Approach to Strong Gravitational Lensing in f(R) Gravity

2010-02-10

arxiv.org/abs/1002.2056v1

Phys.Rev.D83:024030,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages

Scientific paper

10.1103/PhysRevD.83.024030

We present a framework for the study of lensing in spherically symmetric spacetimes within the context of f(R) gravity. Equations for the propagation of null geodesics, together with an expression for the bending angle are derived for any f(R) theory and then applied to an exact spherically symmetric solution of R^n gravity. We find that for this case more bending is expected for R^n gravity theories in comparison to GR and is dependent on the value of n and the value of distance of closest approach of the incident null geodesic.

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