First Sagittarius A* Event Horizon Telescope Results. VI. Testing the Black Hole Metric
Woodwell Climate Research Center · Harvard University · +129 more institutions
Indexed inarxivcrossrefdoaj
Abstract
Abstract Astrophysical black holes are expected to be described by the Kerr metric. This is the only stationary, vacuum, axisymmetric metric, without electromagnetic charge, that satisfies Einstein’s equations and does not have pathologies outside of the event horizon. We present new constraints on potential deviations from the Kerr prediction based on 2017 EHT observations of Sagittarius A* (Sgr A*). We calibrate the relationship between the geometrically defined black hole shadow and the observed size of the ring-like images using a library that includes both Kerr and non-Kerr simulations. We use the exquisite prior constraints on the mass-to-distance ratio for Sgr A* to show that the observed image size is…
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Authors
270- KAKazunori AkiyamaCorresponding
- AAA. Alberdi
Woodwell Climate Research Center, Harvard University, National Astronomical Observatory of Japan, Massachusetts Institute of Technology
- WAW. Alef
Instituto de Astrofísica de Andalucía
- JCJuan Carlos Algaba
Max Planck Institute for Radio Astronomy
- RARichard Anantua
University of Malaya
Topics & keywords
Topics
Keywords
- Event horizon
- Sagittarius A*
- Black hole (networking)
- Metric (unit)
- Horizon
- Physics
- Astrophysics
- Telescope
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