Apparent shape of a braneworld rotating black hole (presentación oral, coautor)

LEONARDO AMARILLA; ERNESTO F. EIROA

Villa General Belgrano, Córdoba

Conferencia; Grav13; 2013

FAMAF, Universidad de Córdoba, Argentina

We study the null geodesics of a rotating braneworld black hole in the Randall-Sundrum cosmological scenario. In the Boyer-Lindquist coordinates, the difference between this geometry and the Kerr-Newman one is the possibility of a negative tidal charge term. The shadow cast by this kind of black holes  depends on the angular momentum and the tidal charge. For a fixed value of the rotation parameter, the presence of a negative tidal charge enlarges the shadow and reduces its deformation with respect to Kerr spacetime, while for a positive charge, the opposite effect is obtained. We also consider the case in which the combination of the parameters leads to a naked singularity. Finally, we present a discussion of the observational prospects concerning to the Galactic center supermassive black hole.