TY  - JOUR
AU  - Guerrero, M.
AU  - Olmo, G. J.
AU  - Rubiera-Garcia, D.
PY  - 2023
DA  - 2023//
TI  - Geodesic completeness of effective null geodesics in regular space-times with non-linear electrodynamics
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 785
EP  - 8pp
VL  - 83
IS  - 9
PB  - Springer
AB  - 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.
SN  - 1434-6044
UR  - https://arxiv.org/abs/2304.05852
UR  - https://doi.org/10.1140/epjc/s10052-023-11969-y
DO  - 10.1140/epjc/s10052-023-11969-y
LA  - English
N1  - WOS:001065963300005
ID  - Guerrero_etal2023
ER  -