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http://hdl.handle.net/20.500.12386/32833
Titolo: | Probing the Obscuring Medium Around Active Nuclei Using Masers: The Case of 3C 403 | Autori: | TARCHI, ANDREA Henkel, C. Chiaberge, M. Menten, K. M. Brunthaler, A. MOSCADELLI, Luca |
Data pubblicazione: | 2005 | Titolo del volume in cui è pubblicato il poster: | Dense Molecular Gas Around Protostars and in Galactic Nuclei. European Workshop on Astronomical Molecules 2004 | Curatore/i del volume in cui è pubblicato il contributo: | Baan, W.A.; Hagiwara, Y.; Langevelde, H.J. | Da pagina:: | 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. | Titolo del convegno: | Dense Molecular Gas Around Protostars and in Galactic Nuclei. | Luogo del convegno: | Zwolle, the Netherlands | Periodo del convegno: | 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 |
È visualizzato nelle collezioni: | 3.01 Contributi in Atti di convegno |
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