Dynamics of Fermat potentials in non-perturbative gravitational lensing

Details Dynamics of Fermat potentials in non-perturbative gravitational lensing Dynamics of Fermat potentials in non-perturbative gravitational lensing

2002-05-03

arxiv.org/abs/gr-qc/0205016v1

Phys.Rev. D65 (2002) 123006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.65.123006

We present a framework, based on the null-surface formulation of general relativity, for discussing the dynamics of Fermat potentials for gravitational lensing in a generic situation without approximations of any kind. Additionally, we derive two lens equations: one for the case of thick compact lenses and the other one for lensing by gravitational waves. These equations in principle generalize the astrophysical scheme for lensing by removing the thin-lens approximation while retaining the weak fields.

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