6.7 GHz methanol absorption toward the Seyfert 2 galaxy NGC 3079

Abstract

The detection of the 6.7 GHz line of methanol (CH3OH) is reported for the first time toward an object beyond the Magellanic Clouds. Using the Effelsberg 100 m telescope, two absorption features were identified toward the Seyfert 2 galaxy NGC 3079. Both components probably originated on lines-of-sight toward the central region, presumably absorbing the radio continuum of the nuclear sources A, B, and E of NGC 3079. One absorption feature, at the systemic velocity, is narrow and may arise from gas not related to the nuclear environment of the galaxy. The weaker blue-shifted component is wider and may trace outflowing gas. Total A-type CH3OH column densities are estimated to be between a few times 10^13 and a few times 10^15 cm^-2. Because of a highly frequency-dependent continuum background, the overall similarity of HI, OH, and CH3OH absorption profiles hints at molecular clouds that cover the entire area occupied by the nuclear radio continuum sources ~ 4 pc.

arXiv comment4 pages, 1 figure, accepted for publication in A&A Letters

References in corpus (15)

• Models of class II methanol masers based on improved molecular data
• A general catalogue of 6.7 GHz methanol masers. I: data
• Jet- and Wind-Driven Ionized Outflows in the Superbubble and Star-Forming Disk of NGC 3079
• Evidence for a Geometrically Thick Self-Gravitating Accretion Disk in NGC 3079
• Tightly Correlated X-ray/H$\alpha$ Emitting Filaments in the Superbubble and Large-Scale Superwind of NGC 3079
• Water maser emission and the parsec-scale jet in NGC 3079
• Formaldehyde Densitometry of Starburst Galaxies
• Integral Field Near-IR Spectroscopy of a Sample of Seyfert and LINER Galaxies I: The Data
• Jet-cloud collisions in the jet of the Seyfert galaxy NGC3079
• Mm-wave HCO+, HCN and CO absorption toward NGC1052
• A comprehensive search for extragalactic 6.7-GHz methanol masers
• A Search for 6.7 GHz Methanol Masers in OH Megamaser Galaxies at 0.11<z<0.27
• VLBI imaging of OH absorption: The puzzle of the nuclear region of NGC 3079
• A Search for Extragalactic Methanol Masers
• Red-shifted H2O emission in NGC 3079: more evidence for a pc-scale circumnuclear torus?

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