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Class I methanol masers: masers with extended green objects


Chen, X and Ellingsen, SP and Shen, ZQ, Class I methanol masers: masers with extended green objects, Monthly Notices of the Royal Astronomical Society, 396, (3) pp. 1603-1609. ISSN 0035-8711 (2009) [Refereed Article]

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DOI: doi:10.1111/j.1365-2966.2009.14818.x


We have compared the results of a number of published class I methanol maser surveys with the catalogue of high-mass outflow candidates identified from the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire survey (known as extended green objects or EGOs). We find class I methanol masers associated with approximately two-thirds of EGOs. Although the association between outflows and class I methanol masers has long been postulated on the basis of detailed studies of a small number of sources, this result demonstrates the relationship for the first time on a statistical basis. Despite the publication of a number of searches for class I methanol masers, a close physical association with another astrophysical object which could be targeted for the search is still lacking. The close association between class I methanol masers and EGOs therefore provides a large catalogue of candidate sources, most of which have not previously been searched for class I methanol masers. Interstellar masers and outflows have both been proposed to trace an evolutionary sequence for high-mass star formation, therefore a better understanding of the relationship between class I methanol masers and outflow offers the potential for comparison and amalgamation of these two evolutionary sequences.

Item Details

Item Type:Refereed Article
Keywords:masers-stars:formation-ISM:molecules-infrared:ISM-radio lines:ISM
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:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:57273
Year Published:2009
Web of Science® Times Cited:31
Deposited By:Physics
Deposited On:2009-07-01
Last Modified:2010-03-25

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