Gravitational lensing in metric theories of gravity

Details Gravitational lensing in metric theories of gravity Gravitational lensing in metric theories of gravity

2003-01-15

arxiv.org/abs/astro-ph/0301290v1

Phys.Rev. D67 (2003) 064007

Astronomy and Astrophysics

Astrophysics

15 pages; to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.67.064007

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.

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