Gravitational lensing in metric theories of gravity

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.

15 pages; to appear in Phys. Rev. D

References in corpus (2)

• Gravitational lensing by spinning and escaping lenses
• Gravitational lensing by spherically symmetric lenses with angular momentum

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