A Massive Molecular Outflow in the Dense Dust Core AGAL G337.916-00.477

Kazufumi Torii, Yusuke Hattori, Keisuke Hasegawa, Akio Ohama, Hiroaki Yamamoto, Kengo Tachihara, Kazuki Tokuda, Toshikazu Onishi, Yasuki Hattori, Daisuke Ishihara, Hidehiro Kaneda, Yasuo Fukui

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Massive molecular outflows erupting from high-mass young stellar objects (YSOs) 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 ∼50 M. The maximum velocities of the outflow lobes are as high as 36-40km s-1. Our analysis of the infrared and submillimeter data indicates that AGAL337.9-S is in an early evolutionary stage of high-mass star formation, having the total far-infrared luminosity of ∼5 × 104 L. We also found that another dust core, AGAL G337.922-00.456 (AGAL337.9-N), located 2′ north of AGAL337.9-S, is a high-mass YSO in an earlier evolutionary stage than AGAL337.9-S, as it is less bright in the mid-infrared than AGAL337.9-S.

Original languageEnglish
Article number111
JournalAstrophysical Journal
Issue number2
Publication statusPublished - May 10 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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