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Bounds on Photon Spheres and Shadows of Charged Black Holes in Einstein-Gauss-Bonnet-Maxwell Gravity

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arxiv 1912.05569 v1 pith:7JF2XASH submitted 2019-12-11 gr-qc hep-th

Liang Ma , H. Lu This is my paper
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keywords blackphotonchargedeinstein-gauss-bonnet-maxwellholeholesshadowsspheres
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abstract

We consider spherically symmetric and static charged black holes in Einstein-Gauss-Bonnet-Maxwell gravities in general $D\ge 5$ 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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