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 AGALG337.916-00.477 (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_sun. The maximum velocities of the outflow lobes are as high as 35-40 km/s. 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 ~5x10^4 L_sun. We also found that another dust core AGALG337.922-00.456 (AGAL337.9-N) located 2' 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.
@article{arxiv.1604.05789,
title = {A massive molecular outflow in the dense dust core AGAL G337.916-00.477},
author = {Kazufumi Torii and Yusuke Hattori and Keisuke Hasegawa and Akio Ohama and Hiroaki Yamamoto and Kengo Tachihara and Kazuki Tokuda and Toshikazu Onishi and Yasuki Hattori and Daisuke Ishihara and Hidehiro Kaneda and Yasuo Fukui},
journal= {arXiv preprint arXiv:1604.05789},
year = {2017}
}
Comments
15 pages, 7 figures, 3 tables, accepted for publication in ApJ