The Disk–Outflow System around the Rare Young O-type Protostar W42-MME

We present line and continuum observations (resolution ~0.3"-3.5") made with the Atacama Large Millimeter/submillimeter Array (ALMA), Submillimeter Array, Very of a young O-type protostar W42-MME (mass: 19-4 Msun). The ALMA 1.35 mm map ~1") shows that is embedded in one cores (i.e., MM1) located within thermally supercritical filament-like feature (extent ~0.15 pc) containing three (mass ~1-4.4 Several dense/hot gas tracers are detected toward MM1, suggesting presence hot molecular core temperature ~38-220~K. 865 micron ~0.3") reveals at least five sources/peaks ("A-E") dusty envelope ~9000 AU) where shocks traced SiO(8-7) emission. source "A" associated seen almost center envelope, surrounded by other peaks. CO(3-2) show bipolar outflow extended below 10000 AU, which driven "A". data hint episodic ejections from W42-MME. A disk-like ~2000 AU; mass ~1 Msun) velocity gradients investigated (dynamical ~9 using H13CO+ emission, perpendicular to CO outflow. small-scale (below 3000 probably heated UV radiation star also Overall, appears gain its disk envelope.