Poster Presentation

Massive Star Forming Cores with Class II Methanol Masers

Author(s): Sheng-Yuan Liu (ASIAA), Yu-Nung Su (ASIAA), Eduard Vorobyov (U. of Vienna), Dominique Meyer (Potsdam U.), Andrey Sobolev (Ural Federal U.), Xi Chen (SHAO), Sergey Parfenov (Ural Federal U.), and Dmitry Ladeyschikov (Ural Federal U.)

Presenter: Sheng-Yuan Liu (ASIAA)

There are growing evidences suggesting that, similar to those in low-mass young stellar objects (YSOs), luminosity burst phenomena also occur in massive star forming cores. Observationally, luminosity bursts in the submillimeter wavelengths have been witnessed toward at least two massive star forming regions by now, and there are very compelling evidences for the association of Class II methanol maser flaring events and the luminosity burst in massive star forming sites. We therefore conducted in ALMA Cycle 8 survey observations toward more than 150 massive star forming sites associated with 6.7 GHz methanol masers with the 12-m Array at Configuration C4/5 in Band 6. We discuss the general statistical properties of the 1.3mm continuum signatures and the CO/SiO outflows of this massive star formation core sample. The survey data will further serve as an important reference measurement for future burst events.