ATLASGAL --- Environments of 6.7\,GHz methanol masers

Abstract

Using the 870-$\mu$m APEX Telescope Large Area Survey of the Galaxy (ATLASGAL), we have identified 577 submillimetre continuum sources with masers from the methanol multibeam (MMB) survey in the region $280\degr < \ell < 20\degr$; $|\,b\,| < 1.5\degr$. 94\,per\,cent of methanol masers in the region are associated with sub-millimetre dust emission. We estimate masses for ~450 maser-associated sources and find that methanol masers are preferentially associated with massive clumps. These clumps are centrally condensed, with envelope structures that appear to be scale-free, the mean maser position being offset from the peak column density by 0.0 \pm 4". Assuming a Kroupa initial mass function and a star-formation efficiency of ~30\,per\,cent, we find that over two thirds of the clumps are likely to form clusters with masses >20\,\msun. Furthermore, almost all clumps satisfy the empirical mass-size criterion for massive star formation. Bolometric luminosities taken from the literature for ~100 clumps range between ~100 and 10${}^6$\,\lsun. This confirms the link between methanol masers and massive young stars for 90\,per\,cent of our sample. The Galactic distribution of sources suggests that the star-formation efficiency is significantly reduced in the Galactic-centre region, compared to the rest of the survey area, where it is broadly constant, and shows a significant drop in the massive star-formation rate density in the outer Galaxy. We find no enhancement in source counts towards the southern Scutum-Centaurus arm tangent at $\ell ~ 315\degr$, which suggests that this arm is not actively forming stars.

25 pages, 23 figures, 4 tables. The resolution of Figs. 1, 18 and 23 have been reduced to comply with file size restrictions, but high resolution version of the paper is available on request. Paper accepted for publication in MNRAS

References in corpus (13)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• Cold Dark Clouds: The Initial Conditions for Star Formation
• A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidates
• The VLA Galactic Plane Survey
• The earliest phases of high-mass star formation: a 3 square degree millimeter continuum mapping of Cygnus X
• The Large APEX Bolometer Camera LABOCA
• A Class I and Class II Methanol Maser Survey of Extended Green Objects (EGOs) from the GLIMPSE Survey
• Intrinsically Red Sources observed by Spitzer in the Galactic Mid-Plane
• The Atomic to Molecular Transition in Galaxies. I: An Analytic Approximation for Photodissociation Fronts in Finite Clouds
• The 6-GHz Multibeam Maser Survey I. Techniques
• The Luminosity Functions and Timescales of MYSOs and Compact HII regions
• Milky Way Kinematics: Measurements at the Subcentral Point of the Fourth Quadrant
• A SCUBA imaging survey of ultracompact HII regions: The environments of massive star formation

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