Preview

PDF 2Mb

We have selected the positions of 54 6.7 GHz methanol masers from the Methanol Multibeam Survey catalogue, covering a range of longitudes between 20° and 34° of the Galactic plane. These positions were mapped in the J = 3-2 transition of both the ¹³CO and C¹⁸O lines. A total of 58 ¹³CO emission peaks are found in the vicinity of these maser positions. We search for outflows around all ¹³CO peaks, and find evidence for high-velocity gas in all cases, spatially resolving the red and blue outflow lobes in 55 cases. Of these sources, 44 have resolved kinematic distances, and are closely associated with the 6.7 GHz masers, a subset referred to as Methanol Maser Associated Outflows (MMAOs). We calculate the masses of the clumps associated with each peak using 870 μm continuum emission from the ATLASGAL survey. A strong correlation is seen between the clump mass and both outflow mass and mechanical force, lending support to models in which accretion is strongly linked to outflow. We find that the scaling law between outflow activity and clump masses observed for low-mass objects, is also followed by the MMAOs in this study, indicating a commonality in the formation processes of low-mass and high-mass stars.

Item Type:	Refereed Article
Keywords:	line, profiles–masers–stars, formation–stars, massive–ISM, jets and out- flows – submillimetre, stars
Research Division:	Physical Sciences
Research Group:	Astronomical and Space 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:	94030
Year Published:	2014
Web of Science® Times Cited:	21
Deposited By:	Mathematics and Physics
Deposited On:	2014-08-27
Last Modified:	2017-11-03
Downloads:	521 View Download Statistics