First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
Woodwell Climate Research Center · Harvard University · +125 more institutions
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Abstract
Abstract In this paper we provide a first physical interpretation for the Event Horizon Telescope's (EHT) 2017 observations of Sgr A*. Our main approach is to compare resolved EHT data at 230 GHz and unresolved non-EHT observations from radio to X-ray wavelengths to predictions from a library of models based on time-dependent general relativistic magnetohydrodynamics simulations, including aligned, tilted, and stellar-wind-fed simulations; radiative transfer is performed assuming both thermal and nonthermal electron distribution functions. We test the models against 11 constraints drawn from EHT 230 GHz data and observations at 86 GHz, 2.2 μ m, and in the X-ray. All models fail at least one constraint.…
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Authors
274- 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
- Physics
- Astrophysics
- Event horizon
- Galactic Center
- Sagittarius A*
- Very-long-baseline interferometry
- Black hole (networking)
- Population
UN Sustainable Development Goals
- Affordable and clean energy
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