2021RNAAS...5...70R

We present Very Large Array cm continuum observations, as well as 1.3 mm continuum and CO(2-1) observations taken with the Submillimeter Array toward the high-mass protostellar candidate ISOSS J23053+5953 SMM2. Compact cm continuum emission was detected near the center of the SMM2 dust core, and the 1.3 mm thermal dust emission indicates a core mass of 46 M_⊙. The CO(2-1) observation revealed a large, massive molecular flow centered on the SMM2 core. This fast outflow (>50 km s^–1) appears highly collimated, with a broader, lower-velocity component. The large values for outflow mass (45 M_⊙), and energetics derived are consistent with those of flows driven by high-mass YSOs. The dynamical timescale of the flow is between 1.5-7.2 × 10⁴ yr. Our data confirm previous findings that SMM2 is an emerging high-mass protostar in a very early phase of evolution, with an ionized jet, and a fast, highly collimated, and massive outflow.