Proc. IAU volume 13, issue S336, P158-161 2017 DOI: 10.1017/s1743921317008481 View full text
Maxim A. Voronkov, Shari L. Breen, Simon P. Ellingsen, Christopher H. Jordan

Abstract: The Australia Telescope Compact Array (ATCA) participated in a number of survey programs to search for and image common class I methanol masers (at 36 and 44 GHz) with high angular resolution. In this paper, we discuss spatial and velocity distributions revealed by these surveys. In particular, the number of maser regions is found to fall off exponentially with the linear distance from the associated young stellar object traced by the 6.7-GHz maser, and the scale of this distribution is 263±15 milliparsec. Al…

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