Detection of HC${}_3$N maser emission in NGC253

Abstract

We report the detection of maser emission from the $J=4-3$ transition of HC${}_3$N at 36.4~GHz towards the nearby starburst galaxy NGC253. This is the first detection of maser emission from this transition in either a Galactic or extragalactic source. The HC${}_3$N maser emission has a brightness temperature in excess of 2500 K and is offset from the center of the galaxy by approximately 18 arcsec (300 pc), but close to a previously reported class~I methanol maser. Both the HC${}_3$N and methanol masers appear to arise near the interface between the galactic bar and the central molecular zone, where it is thought that molecular gas is being transported inwards, producing a region of extensive low-velocity shocks.

arXiv commentAccepted for publication in ApJ Letters, 7 pages, 3 figures

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Cited by in corpus (7)

• Fire in the Heart: A Characterization of the High Kinetic Temperatures and Heating Sources in the Nucleus of NGC253
• Class I methanol masers in NGC253: Alcohol at the end of the bar
• Detection of 36 GHz Class I Methanol Maser Emission Towards NGC 4945
• Investigations of the Class I methanol masers in NGC 4945
• Detection of 84-GHz class I methanol maser emission towards NGC 253
• Extragalactic maser surveys
• The Maser-Starburst connection in NGC253