PIRSA:19090103

Video URL

https://pirsa.org/19090103

Observational signatures for extremal black holes

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

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

          @misc{ scivideos_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 for Theoretical Physics},
            year = {2019},
            month = {sep},
            note = {PIRSA:19090103 see, \url{https://scivideos.org/index.php/pirsa/19090103}}
          }

Stefanos Aretakis University of Toronto

Talk numberPIRSA:19090103
DOI10.48660/19090103
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
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.