6.7GHz methanol maser flare in G11.497-1.485

With this project, we aim to investigate the context of the ongoing 6.7 GHz methanol maser flare in the little-known massive star forming region G11.497-1.485. Two epoch of the Karl G. Jansky Very Large Array (VLA) observations have been performed for 6.7GHz and 12GHz class II methanol, and 22GHz water masers, as well as continuum at C, Ku, and K-bands.

The VLA overview revealed the presence of five distinct radio-continuum sources (CM1-4 and N) in G11.497-1.485. The central source CM1 is found to show signs of accretion disk fragmentation, highlighted by the cm-continuum traced fragments, as well as to drive a high-energy jet, the ends of which are marked by non-thermal knots CM2 and CM3. CM1 showed a gradual flaring of methanol masers and fading of a 22GHz water maser, which might be signalling an accretion burst.