The evolution of the H₂O maser emission in the accretion burst source G358.93?0.03

The massive young stellar object (MYSO) G358.93-0.03-MM1 showed an extraordinary near-infrared- to (sub-)millimetre-dark and far-infrared-loud accretion burst, which is closely associated with flares of several class II methanol maser transitions, and, later, a 22 GHz water flare. Water provide invaluable insight into ejection events bursts. Although the short timescale flare made it impossible carry out very long baseline interferometry observation, we could track Karl G. Jansky Very Large Array (VLA). evolution spatial structure masers their association continuum sources in region studied VLA during two epochs, pre- post-H2O A drastic change distribution revealed: contrast four groups detected epoch I, only newly formed clusters are II. bursting source MM1 changed morphology emission velocity extent. Clear evidence influence burst on from presented. event has also potentially affected radius ~2'' (~13 500 AU at 6.75 kpc), suppressing other point this region.