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

journal contribution
posted on 2023-05-16, 11:36 authored by Val'tts, IE, Simon EllingsenSimon Ellingsen, Slysh, VI, Kalenskii, SV, Otrupcek, R, Voronkov, MA
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.

History

Publication title

Monthly Notices of the Royal Astronomical Society

Volume

310

Issue

4

Pagination

1077-1086

ISSN

0035-8711

Department/School

School of Natural Sciences

Publisher

Blackwell Science Ltd

Place of publication

Oxford, England

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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