%0 Journal Article
%T Geodesic completeness of effective null geodesics in regular space-times with non-linear electrodynamics
%A Guerrero, M.
%A Olmo, G. J.
%A Rubiera-Garcia, D.
%J European Physical Journal C
%D 2023
%V 83
%N 9
%I Springer
%@ 1434-6044
%G English
%F Guerrero_etal2023
%O WOS:001065963300005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5710), last updated on Mon, 30 Oct 2023 14:07:22 +0000
%X We study the completeness of light trajectories in certain spherically symmetric regular geometries found in Palatini theories of gravity threaded by non-linear (electromagnetic) fields, which makes their propagation to happen along geodesics of an effective metric. Two types of geodesic restoration mechanisms are employed: by pushing the focal point to infinite affine distance, thus unreachable in finite time by any sets of geodesics, or by the presence of a defocusing surface associated to the development of a wormhole throat. We discuss several examples of such geometries to conclude the completeness of all such effective paths. Our results are of interest both for the finding of singularity-free solutions and for the analysis of their optical appearances e.g. in shadow observations.
%R 10.1140/epjc/s10052-023-11969-y
%U https://arxiv.org/abs/2304.05852
%U https://doi.org/10.1140/epjc/s10052-023-11969-y
%P 785-8pp