PIRSA:19090103

Observational signatures for extremal black holes

Aretakis, S. (2019). Observational signatures for extremal black holes. Perimeter Institute. https://pirsa.org/19090103

Aretakis, Stefanos. Observational signatures for extremal black holes. Perimeter Institute, Sep. 19, 2019, https://pirsa.org/19090103 

          @misc{ pirsa_PIRSA:19090103,
            doi = {10.48660/19090103},
            url = {https://pirsa.org/19090103},
            author = {Aretakis, Stefanos},
            keywords = {Strong Gravity},
            language = {en},
            title = {Observational signatures for extremal black holes},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {sep},
            note = {PIRSA:19090103 see, \url{https://pirsa.org}}
          }

Stefanos Aretakis

University of Toronto

Talk number
PIRSA:19090103
Collection
Talk Type
Subject
Abstract

The event horizon and the Cauchy horizon of an extremal black hole admit conserved charges associated with scalar perturbations. We will see that these charges are externally measurable from null infinity. This suggests that these charges have the potential to serve as an observational signature for extremal black holes. The proof of this result is based on obtaining precise late-time asymptotics for the radiation field of outgoing perturbations.