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Bowshocks and Non-Linear Motions Seen in the H2O Masers of AFGL 5142

Authors: R. A. Burns, T. Handa, H. Imai, T. Nagayama, T. Omodaka, T. Hirota, K. Motogi, H. J. van Langevelde, W. A. Baan

Journal: Transactions of IAA RAS vol. 40

Pages: 89 - 93

Year: 2017

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About the paper

Keywords: Masers, Astrometry, Massive Star Formation, AFGL 5142

In this contribution we present new VLBI observations of 22 GHz H₂O masers in the well-known massive star forming region, AFGL 5142. The masers exhibit prototypical well-defined symmetric bowshocks about a central driving source, in addition to revealing the presence of episodic ejection. One water maser located close to the central accreting star shows clear non-linear motion in the sky-plan, possibly indicating the influence of forces near the star/disk. These phenomena (episodic ejection and disk-jet systems) highlight similarities in the processes of low- and high-mass star formation.