Gravitational collapse in Asymptotic Safety

Lunedì 27 novembre p.v., con inizio alle ore 15:00, presso l'Aula M del DFA, il Dott. Antonio Panassiti terrà un seminario dal titolo Gravitational collapse in Asymptotic Safety: a path to regular black holes.

Il seminario appartiene al ciclo Young Physicists to Young Physicists (YP2), organizzato dai Rappresentanti del Dottorato in Fisica.

Tutte le persone interessate sono invitate a partecipare.

Abstract. In this talk we first try to introduce briefly the basic ideas of General Relativity and the concept of black hole singularity, in such a way that people who do not work with General Relativity can enjoy the talk too. Secondly, we describe the gravitational collapse of a star in the context of General Relativity, as depicted by the Oppenheimer-Snyder model, of which the Schwarzschild black hole represents the ending state. Finally, we show how is possible to build a model for the collapse that, implementing the idea of an asymptotically safe gravitational interaction, sources the formation of a regular black hole, i.e. a hypothetical astrophysical object which reproduces, for an external observer, a phenomenology similar to that of a black hole but, at the same time, it is free from the central singularity. Indeed, it is believed that singularities signal a breakdown in the domain of validity of General Relativity and that a more fundamental theory should resolve them.

Lunedì, 27 Novembre, 2023