Seminarium Teorii Względności i Grawitacji

There is still no proof that black holes must necessary be the only final outcome of complete gravitational collapse of astrophysical objects. If naked singularities can occur and if the singularity is to be resolved at some quantum level, then solutions of Einstein equations with naked singularities could in principle describe the surroundings of some 'exotic' compact sources in the universe. We analyze some observable features of accretion disks in spacetimes containing naked singularities in order to understand if they can be observationally different from those of black holes with the same mass.