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- W3209296331 abstract "We present line and continuum observations (resolution ~0.3-3.5) made with the Atacama Large Millimeter/submillimeter Array (ALMA), Submillimeter Array, and Very Large Array of a young O-type protostar W42-MME (mass: 19-4 Msun). The ALMA 1.35 mm continuum map (resolution ~1) shows that W42-MME is embedded in one of the cores (i.e., MM1) located within a thermally supercritical filament-like feature (extent ~0.15 pc) containing three cores (mass ~1-4.4 Msun). Several dense/hot gas tracers are detected toward MM1, suggesting the presence of a hot molecular core with the gas temperature of ~38-220~K. The ALMA 865 micron continuum map (resolution ~0.3) reveals at least five continuum sources/peaks (A-E) within a dusty envelope (extent ~9000 AU) toward MM1, where shocks are traced in the SiO(8-7) emission. The source A associated with W42-MME is seen almost at the center of the dusty envelope, and is surrounded by other continuum peaks. The ALMA CO(3-2) and SiO(8-7) line observations show the bipolar outflow extended below 10000 AU, which is driven by the source A. The ALMA data hint the episodic ejections from W42-MME. A disk-like feature (extent ~2000 AU; mass ~1 Msun) with velocity gradients is investigated in the source A (dynamical mass ~9 Msun) using the ALMA H13CO+ emission, and is perpendicular to the CO outflow. A small-scale feature (below 3000 AU) probably heated by UV radiation from the O-type star is also investigated toward the source A. Overall, W42-MME appears to gain mass from its disk and the dusty envelope." @default.
- W3209296331 created "2021-11-08" @default.
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- W3209296331 date "2022-01-01" @default.
- W3209296331 modified "2023-10-15" @default.
- W3209296331 title "The Disk–Outflow System around the Rare Young O-type Protostar W42-MME" @default.
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- W3209296331 doi "https://doi.org/10.3847/1538-4357/ac36dd" @default.
- W3209296331 hasPublicationYear "2022" @default.
- W3209296331 type Work @default.