PIRSA:18040126

The Fingerprints of Black Holes - Information content in the Black Holes Shadow

Paganini, C. (2018). The Fingerprints of Black Holes - Information content in the Black Holes Shadow. Perimeter Institute. https://pirsa.org/18040126

Paganini, Claudio. The Fingerprints of Black Holes - Information content in the Black Holes Shadow. Perimeter Institute, Apr. 05, 2018, https://pirsa.org/18040126 

          @misc{ pirsa_PIRSA:18040126,
            doi = {10.48660/18040126},
            url = {https://pirsa.org/18040126},
            author = {Paganini, Claudio},
            keywords = {Strong Gravity},
            language = {en},
            title = {The Fingerprints of Black Holes - Information content in the Black Holes Shadow},
            publisher = {Perimeter Institute},
            year = {2018},
            month = {apr},
            note = {PIRSA:18040126 see, \url{https://pirsa.org}}
          }

Claudio Paganini Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)

DOI 10.48660/18040126
Collection
Talk Type Scientific Series
Subject

Abstract

First I will introduce the concept of the shadow of a black hole and what it means for the shadows of two observers to be degenerate. I will then present
our results showing that no continuous
degenerations exist between the shadows of observers at any point in the exterior region of any Kerr-Newman black hole spacetime of unit mass. Therefore an observer can, by measuring the black holes shadow, in principle determine the angular momentum and the charge of the black hole under observation, as well as his radial distance from the black hole and his angle of elevation above the equatorial plane.