Water masers in bowshocks: Addressing the radiation pressure problem of massive star formation
Ross A. Burns
TL;DR
This paper investigates how episodic accretion, traced by water maser observations, helps massive stars overcome radiation pressure during formation, providing new insights into star formation processes.
Contribution
It demonstrates the role of episodic accretion in massive star formation using multi-epoch VLBI water maser observations and literature analysis.
Findings
Episodic ejections traced by masers suggest episodic accretion in massive stars.
Water maser observations reveal bowshock motions indicating collimated jets.
Episodic accretion may resolve the radiation pressure problem in massive star formation.
Abstract
Ejection activities in S255IR-SMA1 and AFGL 5142 were investigated by multi-epoch VLBI observations of 22 GHz water masers, tracing bowshocks leading collimated jets. The history of ejections, revealed by the 3D maser motions and supplemented by the literature, suggests that these massive stars formed by episodic accretion, inferred via the accretion-ejection connection. This contribution centers on the role of episodic accretion in overcoming the radiation pressure problem of massive star formation - with maser VLBI and single-dish observations providing essential observational tools.
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