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A comprehensive search for extragalactic 6.7-GHz methanol masers


Phillips, CJ and Norris, RP and Ellingsen, SP and Rayner, DP, A comprehensive search for extragalactic 6.7-GHz methanol masers, Monthly Notices of the Royal Astronomical Society, 294, (2) pp. 265-271. ISSN 0035-8711 (1998) [Refereed Article]

DOI: doi:10.1111/j.1365-8711.1998.01134.x


We have used the Australia Telescope Compact Array (ATCA) to search for 6.7-GHz methanol maser emission towards 87 galaxies. We chose the target sources using several criteria, including far-IR luminosities and the presence of known OH megamasers. In addition, we searched for methanol masers in the nearby starburst galaxy NGC 253, making a full spectral-line synthesis image. No emission was detected in any of the galaxies, with detection limits ranging from 25 to 75 mJy. This is surprising, given the close association of OH and methanol masers in Galactic star formation regions, and significantly constrains models of OH megamaser emission. This absence of maser emission may be a result of low methanol abundances in molecular clouds in starburst galaxies.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Phillips, CJ (Dr Christopher Phillips)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
UTAS Author:Rayner, DP (Mr David Peter Rayner)
ID Code:13610
Year Published:1998
Web of Science® Times Cited:25
Deposited By:Physics
Deposited On:1998-08-01
Last Modified:2011-08-08

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