Abstract We present the results of a high-resolution study with the Submillimeter Array (SMA) toward the massive star-forming complex G20.08–0.14N. With the SMA data, we have detected and analyzed the transitions in the 12CO (3–2) and 12CO (2–1) molecular lines as well as CH3CN. The millimeter observations reveal highly collimated bipolar molecular outflows, traced by high-velocity 12CO (2–1) and 12CO (3–2) emissions. Using a rotation temperature diagram, we derive that the rotational temperature and the column density of CH3CN are 244 K and 1.2×1015cm−2, respectively. We also suggest that the minor outflow is probably driven by the hypercompact (HC) HII region A that is inside. We find the molecular gas (traced by C17O, SO, CH3OH and SO2) surrounding G20.08–0.14N appears to be undergoing bulk rotation. The HCHII region A that is inside is most probably the main source of accretion and heating for G20.08–0.14N.
Keywords ISM: individual objects (G20.08–0.14N) — ISM: molecules — radio lines: ISM — stars: formation — ISM: kinematics and dynamics
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