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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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