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Detection of new sources of methanol emission at 107 and 108 GHz with the Mopra telescope


Val'tts, IE and Ellingsen, SP and Slysh, VI and Kalenskii, SV and Otrupcek, R and Voronkov, MA, Detection of new sources of methanol emission at 107 and 108 GHz with the Mopra telescope, Monthly Notices of the Royal Astronomical Society, 310, (4) pp. 1077-1086. ISSN 0035-8711 (1999) [Refereed Article]

DOI: doi:10.1046/j.1365-8711.1999.03009.x


A southern hemisphere survey of methanol emission sources in two millimetre-wave transitions has been carried out using the ATNF Mopra millimetre telescope. 16 emission sources have been detected in the 31-40 A+ transition of methanol at 107 GHz, including six new sources exhibiting class II methanol maser emission features. Combining these results with the similar northern hemisphere survey, a total of eleven 107-GHz methanol masers have been detected. A survey of the methanol emission in the 00-1-1 E transition at 108 GHz has resulted in the detection of 16 sources; one of them showing maser characteristics. This is the first methanol maser detected at 108 GHz, presumably of class II. The results of large velocity gradient statistical equilibrium calculations confirm the classification of these new sources as class II methanol masers.

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:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:16080
Year Published:1999
Web of Science® Times Cited:36
Deposited By:Physics
Deposited On:1999-08-01
Last Modified:2000-05-20

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