Formation of the twin galactic starburst regions NGC 6357 and NGC 6334. Issue Volume 12:Issue S316(2015) (31st March 2017)

• Record Type: Journal Article
• Authors: Torii, Kazufumi; Hasegawa, Keisuke; Ohama, Akio; Yamamoto, Hiroaki; Tachihara, Kengo; Fukui, Yasuo
• Editors: Charbonnel, Corinne; Nota, Antonella
• Is Part Of: Proceedings of the International Astronomical Union. Volume 12:Issue S316(2015)
• Page Start: 173
• Page End: 174
• Publication Date: 2017-03-31
• Subjects: ISM: clouds — ISM: molecules — ISM: kinematics and dynamics — stars: formation; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921316000016
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: New CO J =1–0 observations with NANTEN and NANTEN2 reveal that extensive collisions between two molecular clouds at relative velocity of 15 km s −1 triggered the O star formation in the Galactic mini-starbursts NGC 6357 and NGC 6334. Correlated/anti-correlated gas distributions and intermediate velocity features between the two clouds lend support for the cloud-cloud collision scenario. The timescale of the collision and high-mass star formation is as short as less than 0.5 Myrs, suggesting rapid O star formation.