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. Ellingsen, M.D. Gray, M. Pestalozzi, L. Quinn, M.A. Thompson, M. Voronkov

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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.
    Original languageEnglish
    Pages (from-to)913-935
    JournalMonthly Notices of the Royal Astronomical Society
    Issue number3
    Publication statusPublished - 2010


    • masers
    • surveys
    • stars : formation
    • ISM : molecules


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