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  A detection of Sgr A* in the far infrared

Fellenberg, S. D. v., Gillessen, S., Graciá-Carpio, J., Fritz, T. K., Dexter, J., Bauböck, M., et al. (2020). A detection of Sgr A* in the far infrared.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000D-4B38-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000D-4B39-0
Genre: Conference Paper

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 Creators:
Fellenberg, Sebastiano D. von1, Author           
Gillessen, Stefan1, Author           
Graciá-Carpio, Javier1, Author           
Fritz, Tobias K., Author
Dexter, Jason1, Author           
Bauböck, Michi1, Author           
Ponti, Gabriele2, Author           
Gao, Feng1, Author           
Habibi, Maryam1, Author           
Plewa, Philipp M.1, Author           
Pfuhl, Oliver1, Author           
Jimenez-Rosales, Alejandra1, Author           
Waisberg, Idel1, Author           
Widmann, Felix1, Author           
Ott, Thomas1, Author           
Eisenhauer, Frank1, Author           
Genzel, Reinhard1, Author           
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              
2High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: We report the first detection of the Galactic Centre massive black hole, Sgr A*, at 100 and 160 μm. Our measurements were obtained with PACS on board the Herschel satellite at 100 μ m and 160 μm. We measure a significant and simultaneous variation of its flux of Δ Fν=160μm =(0.27±0.06) Jy and Δ Fν=100 μm =(0.16±0.10) Jy during one observation. The significance level of the 160 μ m band variability is 4.5σ and the corresponding 100 μm band variability is significant at 1.6σ. We find no example of an equally significant false positive detection. Conservatively assuming a variability of 25% in the FIR, we can provide upper limits to the flux. The upper limits are consistent with modern ALMA and VLA observations. Our upper limits provide further evidence for a spectral peak at ∼ 1012 Hz and constrain the number density of γ∼100 electrons in the accretion disk and or outflow.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: Other: LOCALID: Reihe: Astron..528, p.203-206
URI: http://www.aspbooks.org/a/volumes/article_details/?paper_id=40077
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Title: New Horizons in Galactic Center Astronomy and Beyond
Place of Event: Keio University, Yokohama, Japan
Start-/End Date: 2019-10-21 - 2019-10-24

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Title: Galactic center workshop 2019: New Horizons in Galactic Center Astronomy and Beyond
Source Genre: Multi-Volume
 Creator(s):
Masato , Tsuboi, Author
Tomoharu , Oka, Author
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Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISBN: 978-1-58381-943-2
ISBN: 978-1-58381-944-9

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Title: Astronomical Society of the Pacific Conference Series
  Other : ASP Conference Series
Source Genre: Series
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Publ. Info: San Francisco, CA, USA : Astronomical Society of the Pacific
Pages: - Volume / Issue: 528 Sequence Number: - Start / End Page: 302 - 306 Identifier: ISSN: 1050-3390