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A sensitive search for predicted methanol maser transitions with the Australia Telescope Compact Array


Chipman, A and Ellingsen, SP and Sobolev, AM and Cragg, DM, A sensitive search for predicted methanol maser transitions with the Australia Telescope Compact Array, Publications of the Astronomical Society of Australia, 33 Article e056. ISSN 1448-6083 (2016) [Refereed Article]

Copyright Statement

Astronomical Society of Australia 2016

DOI: doi:10.1017/pasa.2016.48


We have used the Australia Telescope Compact Array to search for a number of centimetre wavelength methanol transitions which are predicted to show weak maser emission towards star formation regions. Sensitive, high spatial, and spectral resolution observations towards four high-mass star formation regions which show emission in a large number of class II methanol maser transitions did not result in any detections. From these observations, we are able to place an upper limit of ≲ 1300 K on the brightness temperature of any emission from the 31A+31A-, 17-218-3 E (vt = 1), 124133 A-, 124133 A+, and 41A+41A- transitions of methanol in these sources on angular scales of 2 arcsec. This upper limit is consistent with current models for class II methanol masers in high-mass star formation regions and better constraints than those provided here will likely require observations with next-generation radio telescopes.

Item Details

Item Type:Refereed Article
Keywords:ISM, molecules, masers, radio lines, stars, formation
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:Chipman, A (Mr Antony Chipman)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:112496
Year Published:2016
Web of Science® Times Cited:2
Deposited By:Mathematics and Physics
Deposited On:2016-11-14
Last Modified:2017-11-01

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