First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
Woodwell Climate Research Center · Harvard University · +141 more institutions
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Abstract
Abstract We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A*), the Galactic center source associated with a supermassive black hole. These observations were conducted in 2017 using a global interferometric array of eight telescopes operating at a wavelength of λ = 1.3 mm. The EHT data resolve a compact emission region with intrahour variability. A variety of imaging and modeling analyses all support an image that is dominated by a bright, thick ring with a diameter of 51.8 ± 2.3 μ as (68% credible interval). The ring has modest azimuthal brightness asymmetry and a comparatively dim interior. Using a large suite of numerical simulations, we demonstrate that the EHT images…
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Authors
388- KAKazunori AkiyamaCorresponding
Woodwell Climate Research Center, Harvard University, National Astronomical Observatory of Japan, Massachusetts Institute of Technology
- AAA. Alberdi
Woodwell Climate Research Center, Harvard University, Instituto de Astrofísica de Andalucía, National Astronomical Observatory of Japan, Massachusetts Institute of Technology
- WAW. Alef
Max Planck Institute for Radio Astronomy, Instituto de Astrofísica de Andalucía
- JCJuan Carlos Algaba
University of Malaya, Max Planck Institute for Radio Astronomy
- RARichard Anantua
Woodwell Climate Research Center, Harvard University, University of Malaya, Center for Astrophysics Harvard & Smithsonian, The University of Texas at San Antonio
Topics & keywords
Topics
Keywords
- Sagittarius A*
- Supermassive black hole
- Galactic Center
- Milky Way
- Sagittarius
- Physics
- Event horizon
- Astronomy
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