A Geometrical Approach to Strong Gravitational Lensing in f(R) Gravity
General Relativity and Quantum Cosmology
2011-02-25 v1 Cosmology and Nongalactic Astrophysics
Abstract
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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Cite
@article{arxiv.1002.2056,
title = {A Geometrical Approach to Strong Gravitational Lensing in f(R) Gravity},
author = {Anne Marie Nzioki and Peter K. S. Dunsby and Rituparno Goswami and Sante Carloni},
journal= {arXiv preprint arXiv:1002.2056},
year = {2011}
}
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9 pages