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Turning black holes and D-branes inside out of their photon spheres

2022; American Physical Society; Volume: 105; Issue: 12 Linguagem: Inglês

10.1103/physrevd.105.126007

2470-0037

Massimo Bianchi, Giorgio Di Russo,

Cosmology and Gravitation Theories

The authors study a peculiar symmetry of many black hole systems (conformal inversion), which changes the physics at infinity with the one at the horizon while keeping the photon sphere fixed. The latter is the region of strong gravitation close to the horizon where light can travel in circles. It is shown that the scattering angle for massless (or very special massive) probes coming from infinity coincides with the angle of probes of the same energy and angular momentum under which they are falling into the horizon starting from the photon sphere.