Bounds on Photon Spheres and Shadows of Charged Black Holes in Einstein-Gauss-Bonnet-Maxwell Gravity
Liang Ma, H. Lu
TL;DR
This paper investigates photon spheres and shadows of charged black holes in higher-dimensional Einstein-Gauss-Bonnet-Maxwell gravity, confirming inequalities relating their geometric features and mass.
Contribution
It establishes that charged black holes in this theory satisfy recently proposed inequalities among horizon, photon sphere, shadow, and mass in dimensions five and above.
Findings
Black holes satisfy the inequalities relating horizon, photon sphere, shadow, and mass.
Results extend the understanding of black hole geometry in higher-dimensional gravity theories.
Provides bounds on photon spheres and shadows in Einstein-Gauss-Bonnet-Maxwell gravity.
Abstract
We consider spherically symmetric and static charged black holes in Einstein-Gauss-Bonnet-Maxwell gravities in general dimensions and study their photon spheres and black hole shadows. We show that they all satisfy the sequence of inequalities recently proposed relating a black hole's horizon, photon sphere, shadow and its mass.
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