First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
Woodwell Climate Research Center · Harvard University · +75 more institutions
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Abstract
Abstract We present the first Event Horizon Telescope (EHT) images of M87, using observations from April 2017 at 1.3 mm wavelength. These images show a prominent ring with a diameter of ∼40 μ as, consistent with the size and shape of the lensed photon orbit encircling the “shadow” of a supermassive black hole. The ring is persistent across four observing nights and shows enhanced brightness in the south. To assess the reliability of these results, we implemented a two-stage imaging procedure. In the first stage, four teams, each blind to the others’ work, produced images of M87 using both an established method (CLEAN) and a newer technique (regularized maximum likelihood). This stage allowed us to avoid shared…
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Authors
215- KAKazunori AkiyamaCorresponding
Woodwell Climate Research Center, Harvard University, National Radio Astronomy Observatory, National Astronomical Observatory of Japan, Massachusetts Institute of Technology
- AAA. Alberdi
Instituto de Astrofísica de Andalucía
- WAW. Alef
Max Planck Institute for Radio Astronomy
- KAKeiichi Asada
Institute of Astronomy and Astrophysics, Academia Sinica
- RARebecca Azulay
Universitat de València, Parc Científic de la Universitat de València, Max Planck Institute for Radio Astronomy
Topics & keywords
Topics
Keywords
- Supermassive black hole
- Physics
- Shadow (psychology)
- Telescope
- Asymmetry
- Brightness
- Galaxy
- Astrophysics
UN Sustainable Development Goals
- Sustainable cities and communities
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