Journal Article

The 6-GHz methanol multibeam maser catalogue – II. Galactic longitudes 6° to 20°

J. A. Green, J. L. Caswell, G. A. Fuller, A. Avison, S. L. Breen, S. P. Ellingsen, M. D. Gray, M. Pestalozzi, L. Quinn, M. A. Thompson and M. A. Voronkov

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 409, issue 3, pages 913-935
Published in print December 2010 | ISSN: 0035-8711
Published online December 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17376.x
The 6-GHz methanol multibeam maser catalogue – II. Galactic longitudes 6° to 20°

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We present the second portion of an unbiased survey of the Galactic plane for 6668-MHz methanol masers. This section of the survey spans the longitude range 6° to 20°. We report the detection of 119 maser sources, of which 42 are new discoveries. The masers are tightly constrained to the Galactic plane, with only four outside a latitude range of ±1°. This longitude region includes the brightest known 6668-MHz methanol maser, 9.621+0.196, as well as the two brightest newly discovered sources in the southern survey as a whole. We list all the sources associated with the 3-kpc arms within ±15° longitude and consider further candidates beyond 15° longitude. We identify three new sources associated with the Galactic bar and comment on the density of masers in relation to the bar orientation.

Keywords: masers; surveys; stars: formation; ISM: molecules; Galaxy: structure

Journal Article.  9297 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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