Joanna Piwnik, Joanna Gonera, Piotr Kosinski
Published 2024-05-23Version 1
The Fermat principle is used for the analysis of light propagation in the metric of a black hole. It is shown how to apply the Lindstedt-Poincare method of solving perturbatively the nonlinear oscillations to the description of light trajectories in weak deflection regime.
Light propagation in inhomogeneous and anisotropic cosmologies
Light propagation in 2PN approximation in the field of one moving monopole II. Boundary value problem
Shadow and weak deflection angle of a black hole in nonlocal gravity
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