A detection of Sgr A* in the far infrared

Fellenberg, Sebastiano D. von; Gillessen, Stefan; Graciá-Carpio, Javier; Fritz, Tobias K.; Dexter, Jason; Bauböck, Michi; Ponti, Gabriele; Gao, Feng; Habibi, Maryam; Plewa, Philipp M.; Pfuhl, Oliver; Jimenez-Rosales, Alejandra; Waisberg, Idel; Widmann, Felix; Ott, Thomas; Eisenhauer, Frank; Genzel, Reinhard

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A detection of Sgr A* in the far infrared

MPS-Authors

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Fellenberg, Sebastiano D. von
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4768

Gillessen, Stefan
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons22336

Graciá-Carpio, Javier
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons146381

Dexter, Jason
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons216131

Bauböck, Michi
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons82450

Ponti, Gabriele
High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons214427

Gao, Feng
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons181377

Habibi, Maryam
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons82556

Plewa, Philipp M.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4782

Pfuhl, Oliver
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons216133

Jimenez-Rosales, Alejandra
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons188252

Waisberg, Idel
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons214431

Widmann, Felix
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons16190

Ott, Thomas
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4766

Eisenhauer, Frank
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4590

Genzel, Reinhard
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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引用

Fellenberg, S. D. v., Gillessen, S., Graciá-Carpio, J., Fritz, T. K., Dexter, J., Bauböck, M., Ponti, G., Gao, F., Habibi, M., Plewa, P. M., Pfuhl, O., Jimenez-Rosales, A., Waisberg, I., Widmann, F., Ott, T., Eisenhauer, F., & Genzel, R. (2020). A detection of Sgr A* in the far infrared.

引用: https://hdl.handle.net/21.11116/0000-000D-4B38-1

要旨

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 F_ν=160μm =(0.27±0.06) Jy and Δ F_{ν=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.