Gravitational lensing in metric theories of gravity
Astrophysics
2009-11-07 v1
Abstract
Gravitational lensing in metric theories of gravity is discussed. I introduce a generalized approximate metric element, inclusive of both post-post-Newtonian (ppN) contributions and gravito-magnetic field. Following Fermat's principle and standard hyphoteses, I derive the time delay function and deflection angle caused by an isolated mass distribution. Several astrophysical systems are considered. In most of the cases, the gravito-magnetic correction offers the best perspectives for an observational detection. Actual measurements distinguish only marginally different metric theories one from another.
Keywords
Cite
@article{arxiv.astro-ph/0301290,
title = {Gravitational lensing in metric theories of gravity},
author = {M. Sereno},
journal= {arXiv preprint arXiv:astro-ph/0301290},
year = {2009}
}
Comments
15 pages; to appear in Phys. Rev. D