摘要：Stellar mass black holes are expected to form as the final stage of the gravitational collapse of massive stars. According to Penrose's singularity theorem, once trapped surfaces are formed, gravitational collapse leads to spacetime singularities under appropriate global assumptions and the null energy condition. The presence of such singularities remains one of the central problems of classical general relativity. For this reason, increasing attention has recently been devoted to nonsingular solutions of the Einstein equations, known as regular black holes.
However, the formation of a regular center during gravitational collapse requires a matter source that violates the strong energy condition in the high density central region. Such matter is not present in ordinary massive stars. Therefore, if regular black holes are formed in nature, the required matter must be generated dynamically during the collapse itself. This process should be accompanied by energy release and may therefore have observable astrophysical signatures.
In this talk, I will discuss models of gravitational collapse in which initially ordinary matter evolves toward a regular black hole. I will also show how one can estimate the energy density released during the formation of the matter supporting the regular center and discuss possible astrophysical consequences of this mechanism.
个人简介：Dr. Vitalii Vertogradov is a Leading Researcher at Herzen State Pedagogical University of Russia and is currently working at the Wilczek Quantum Center, Shanghai Institute for Advanced Studies. His research interests include general relativity, black hole physics, regular and dynamical black holes, gravitational collapse and black hole shadow. His current work focuses on the formation, evaporation, and observational signatures of regular black holes.