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Paper: Spatially Resolving an Extremely Young Intermediate-mass Protostar in Orion
Volume: 476, New Trends in Radio Astronomy in the ALMA Era
Page: 397
Authors: Takahashi, S.; Saigo, K.; Ho, P. T. P.; Tomida, K.
Abstract: We present subarcsecond resolution 850 μm continuum emission, HCN (4–3) and CO (3–2) observations made with the Submillimeter Array (SMA), toward an extremely young intermediate-mass protostellar core, MMS 6-main, located in the Orion Molecular Cloud 2/3 region. Spatially resolved 850 μm image shows a massive envelope (0.29 M), the presence of hot gas (≥52 K), and an extremely high column density (NH2 = 2.1×1025 cm–2) in the central 120 AU. HCN (4–3) and CO (3–2) observation have successfully imaged a compact molecular outflow lobe associated with MMS 6-main for the first time. The detected outflow is the smallest molecular outflow ever found in the intermediate-mass protostellar cores. Our observational results suggest that MMS 6-main is a protostellar core at the earliest evolutionary stage, most likely shortly after the second core (i.e., protostar) formation.
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