Discovery of the Youngest Molecular Outflow associated with an Intermediate-mass protostellar Core, MMS-6/OMC-3

摘要: We present sub-arcsecond resolution 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 Orion Molecular Cloud 3 region (OMC-3). have successfully imaged a compact molecular outflow lobe (~1500 AU) associated MMS6-main, which is also smallest ever found cores. The dynamical time scale of this estimated to be <100 yr. line width dramatically increases downstream at end ({\Delta}v~25 km s^{-1}), clearly shows bow-shock type velocity structure. mass (~10^{-4} M_{sun}) size are approximately 2-4 orders 1-3 magnitude smaller, while force M_{sun} s^{-1} yr^{-1}) similar, as compared other outflows studied OMC-2/3. These results show that 6-main core earliest evolutionary stage, most likely shortly after 2nd formation.