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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 3 CONTRIBUTI IN ATTI DI CONVEGNO (Proceedings)
  4. 3.01 Contributi in Atti di convegno
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32833
Title: Probing the Obscuring Medium Around Active Nuclei Using Masers: The Case of 3C 403
Authors: TARCHI, ANDREA 
Henkel, C.
Chiaberge, M.
Menten, K. M.
Brunthaler, A.
MOSCADELLI, Luca 
Issue Date: 2005
Volume: Dense Molecular Gas Around Protostars and in Galactic Nuclei. European Workshop on Astronomical Molecules 2004
Editors: Baan, W.A.; Hagiwara, Y.; Langevelde, H.J.
First Page: 117
Abstract: We report the first detection of a water megamaser in a radio-loud galaxy, 3C 403, and present a follow-up study using the VLA. 3C 403 has been observed as a part of a small sample of FR II galaxies with evidence of nuclear obscuration. The isotropic luminosity of the maser is ∼1200 Lʘ. With a recessional velocity of cz ∼- 17680 km s<SUP>-1</SUP> it is the most distant water maser so far reported. The line arises from the densest (>10<SUP>8</SUP> cm <SUP>-3</SUP>) interstellar gas component ever observed in a radio-loud galaxy. Two spectral features are identified, likely bracketing the systemic velocity of the galaxy. Our interferometric data clearly indicate that these arise from a location within 0.1″ (≈110 pc) from the active galactic nucleus. We conclude that the maser spots are most likely associated with the tangentially seen parts of a nuclear accretion disk, while an association with dense warm gas interacting with the radio jets cannot yet be ruled out entirely.
Conference Name: Dense Molecular Gas Around Protostars and in Galactic Nuclei.
Conference Place: Zwolle, the Netherlands
Conference Date: February 18–20, 2004
URI: http://hdl.handle.net/20.500.12386/32833
URL: https://link.springer.com/book/10.1007/1-4020-3831-3
ISBN: 978-1-4020-3038-3
978-1-4020-3831-0
DOI: 10.1007/1-4020-3831-3_14
Bibcode ADS: 2005dmgp.book..117T
Fulltext: open
Appears in Collections:3.01 Contributi in Atti di convegno

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