Class I methanol masers: masers with extended green objects

Details Class I methanol masers: masers with extended green objects Class I methanol masers: masers with extended green objects

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mnras.396.1603c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 396, Issue 3, pp. 1603-1609.

Astronomy and Astrophysics

Astronomy

13

Masers, Stars: Formation, Ism: Molecules, Infrared: Ism, Radio Lines: Ism

Scientific paper

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.

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