Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série APC-TH
Domaines gr-qc
Date Mardi 25 Janvier 2022
Heure 14:00
Institut APC
Salle contact roperpol@apc.in2p3.fr for Zoom meeting details
Nom de l'orateur Casals
Prenom de l'orateur Marc
Addresse email de l'orateur
Institution de l'orateur University College Dublin
Titre Black Hole Stability Properties: from Instability of Extremal Kerr to Violation of Cosmic Censorship
Résumé Black holes in the Universe do not exist in isolation but, rather, they are surrounded by matter. It is therefore important to study the stability properties of black holes under matter field perturbations. In this talk we will discuss the stability properties under classical field perturbations of several rotating (Kerr) black hole spacetimes. In particular, we will present recent results on some of the mode stability properties of the following: (i) a maximally-rotating (extremal) Kerr black hole, whose event horizon suffers from the so-called Aretakis instability; (ii) Kerr-de Sitter spacetime, representing a Kerr black hole in a Universe with accelerated expansion, and so possessing a cosmological horizon as well as an event horizon; and (iii) the inner (Cauchy) horizon of Kerr- Newman-de Sitter spacetime, representing a charged Kerr-de Sitter black hole, where we find evidence for violation of Penrose’s strong Cosmic Censorship conjecture.
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