Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-04-13
Astronomy and Astrophysics
Astrophysics
5 pages, 1 figure, IAU Symposium 242 Conference Proceedings
Scientific paper
10.1017/S1743921307012677
Methanol maser emission has proven to be an excellent signpost of regions undergoing massive star formation (MSF). To investigate their role as an evolutionary tracer, we have recently completed a large observing program with the ATCA to derive the dynamical and physical properties of molecular/ionised gas towards a sample of MSF regions traced by 6.7 GHz methanol maser emission. We find that the molecular gas in many of these regions breaks up into multiple sub-clumps which we separate into groups based on their association with/without methanol maser and cm continuum emission. The temperature and dynamic state of the molecular gas is markedly different between the groups. Based on these differences, we attempt to assess the evolutionary state of the cores in the groups and thus investigate the role of class II methanol masers as a tracer of MSF.
Barnes Jeff P.
Burton Michael G.
Longmore Steve N.
Ott Jorgen
Purcell Cormac R.
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