Massive molecular outflows erupting from high-mass young stellar objects provide important clues to understanding the mechanism of high-mass star formation .
Based on new CO J =3–2 and J =1–0 observations using the Atacama Submillimeter Telescope Experiment ( ASTE ) and Mopra telescope facilities , we discovered a massive bipolar outflow associated with the dense dust core AGAL G337.916-00.477 ( AGAL337.9-S ) , located 3.48 kpc from the Sun .
The outflow lobes have extensions of less than 1 pc—and thus were not fully resolved in the angular resolutions of ASTE and Mopra—and masses of 35 – 40 M _ { \odot } .
The maximum velocities of the outflow lobes are as high as 35 – 40 km s ^ { -1 } .
Our analysis of the infrared and sub-mm data indicates that AGAL337.9-S is in an early evolutionary stage of the high-mass star formation , having the total far-infrared luminosity of \sim 5 \times 10 ^ { 4 } L _ { \odot } .
We also found that another dust core AGAL G337.922-00.456 ( AGAL337.9-N ) located 2 ^ { \prime } north of AGAL337.9-S is a high-mass young stellar object in an earlier evolutional stage than AGAL337.9-S , although it is less bright in the mid-infrared than AGAL337.9-S .