Light bending by a slowly rotating source in quadratic theories of gravity
arXiv:2005.05355 · doi:10.1103/PhysRevD.102.024020
Abstract
In this paper we study the light bending caused by a slowly rotating source in the context of quadratic theories of gravity, in which the Einstein--Hilbert action is extended by additional terms quadratic in the curvature tensors. The deflection angle is computed employing the method based on the Gauss--Bonnet theorem and working in the approximation of a weak lens; also, we assume that the source and observer are at an infinite distance. The formalism presented is very general and applies to any spacetime metric in the limit of weak gravitational field and slow rotation. We find the explicit formula for the deflection angle for several local and nonlocal theories, and also discuss some phenomenological implications.
30 pages, 1 figure. V2: references added, version accepted for publication in PRD
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- On effective models of regular black holes inspired by higher-derivative and nonlocal gravity
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- Quantum interference in external gravitational fields beyond General Relativity
- Regular multi-horizon Lee-Wick black holes
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- Black holes in non-local gravity