G10.472+0.027: An Extreme water maser outflow associated with a Massive Protostellar Cluster

Abstract

An Australia Telescope Compact Array search for 22 GHz water masers towards 6.7 GHz class II methanol masers detected in the Methanol Multibeam (MMB) survey has resulted in the detection of extremely high velocity emission from one of the sources. The water maser emission associated with this young stellar object covers a velocity span of nearly 300 km/s. The highest velocity water maser emission is red-shifted from the systemic velocity by 250 km/s, which is a new record for high-mass star formation regions. The maser is associated with a very young late O, or early B star, which may still be actively accreting matter (and driving the extreme outflow). If that is the case future observations of the kinematics of this water maser will provide a unique probe of accretion processes in the highest mass young stellar objects and test models of water maser formation.

Accepted for publication in ApJ Letters, 6 pages, 4 figures

References in corpus (6)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• Star formation through gravitational collapse and competitive accretion
• The 6-GHz Multibeam Maser Survey I. Techniques
• Confirmation of the exclusive association between 6.7-GHz methanol masers and high-mass star formation regions
• Interstellar H${}_2$O Masers from J Shocks
• Parkes full polarization spectra of OH masers - I. Galactic longitudes 350 through the Galactic Centre to 41

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• Diagnostics of a Nuclear Starburst: Water and Methanol Masers
• 12.2-GHz methanol maser MMB follow-up catalogue - III. Longitude range 10 to 20 degrees
• A photoionized accretion disk around a young high-mass star
• Composite profile of the Fe K$\alpha$ spectral line emitted from a binary system of supermassive black holes
• MAGMO: Polarimetry of 1720-MHz OH Masers towards Southern Star Forming Regions
• Comparison of three Statistical Classification Techniques for Maser Identification
• Evidence for Coupling of Evolved Star Atmospheres and Spiral Arms of the Milky Way
• Disk-outflow models as applied to high mass star forming regions through methanol and water maser observations