Shadow, deflection angle and quasinormal modes of BornInfeld charged black holes
Abstract
In this paper, we consider black holes in the consistent AokiGorjiMukohyama theory of the fourdimensional EinsteinGaussBonnet (4D EGB) gravity in the presence of BornInfeld (BI) nonlinear electrodynamics. We study several optical features of these black holes such as the shadow radius, energy emission rate and deflection angle, and analyse the effect of the coupling constants, the electric charge and cosmological constant on the considered optical quantities. Furthermore, we also employ the connection between the shadow radius and quasinormal modes (QNMs) and investigate small scalar perturbations around the black hole solution. We show that the variation of the parameters of the theory provide specific signatures on the optical features of the BI charged black hole solution, thus leading to the possibility of directly testing this consistent AokiGorjiMukohyama 4D EGB black hole model by using astrophysical observations.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 April 2021
 DOI:
 10.1088/14757516/2021/04/008
 arXiv:
 arXiv:2010.05755
 Bibcode:
 2021JCAP...04..008J
 Keywords:

 GR black holes;
 gravity;
 modified gravity;
 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena;
 High Energy Physics  Theory
 EPrint:
 10 pages, 4 figures V2: Analysis improved with the consistent AokiGorjiMukohyama theory of 4D EGB gravity with BI nonlinear electrodynamics. Discussion and references added