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题名: Structures of GMC W 37
作者: Zhan, Xiao-Liang; Jiang ZhiBo(江治波)1; Chen, Zhi-Wei; Zhang, Miao-Miao; Song, Chao
刊名: RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期: 2016-04-01
卷号: 16, 期号:4
关键词: ISM: clouds ; ISM: structure ; ISM: kinematics and dynamics ; ISM: individual objects (W37, M16)
DOI: 10.1088/1674-4527/16/4/056
文章类型: Article
英文摘要: We carried out observations toward the giant molecular cloud W 37 with the J = 1 - 0 transitions of (CO)-C-12, (CO)-C-13 and (CO)-O-18 using the 13.7 m single-dish telescope at the Delingha station of Purple Mountain Observatory. Based on these CO lines, we calculated the column densities and cloud masses for molecular clouds with radial velocities around +20 km s(-1). The gas mass of W 37, calculated from (CO)-C-13 emission, is 1.7 x 10(5) M-circle dot, above the criterion to be considered a giant molecular cloud. The dense ridge of W 37 is a dense filament, which is supercritical in terms of linear mass ratio. Dense clumps found by (CO)-O-18 emission are aligned along the dense ridge at regular intervals of about 2.8 pc, similar to the clump separation caused by large-scale 'sausage instability'. We confirm the identification of the giant molecular filament (GMF) G18.0-16.8 and find a new giant filament, G16.5-15.8, located similar to 0.7 degrees to the west of G18.0-16.8. Both GMFs are not gravitationally bound, as indicated by their low linear mass ratio (similar to 80 M-circle dot pc(-1)). We compared the gas temperature map with the dust temperature map from Herschel images, and found similar structures. The spatial distributions of class I objects and the dense clumps are reminiscent of triggered star formation occurring in the northwestern part of W 37, which is close to NGC6611.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: YOUNG STELLAR OBJECTS ; EAGLE NEBULA ; MILKY-WAY ; STAR-FORMATION ; MASSIVE STARS ; MOLECULAR CLOUDS ; SPIRAL ARMS ; NGC-6611 ; FILAMENTS ; CREATION
收录类别: SCI
项目资助者: Strategic Priority Research Program 'The Emergence of Cosmological Structure' of the Chinese Academy of Sciences(XDB09000000) ; Millimeter Wave Radio Astronomy Database ; Key Laboratory for Radio Astronomy, CAS ; National Natural Science Foundation of China(11233007) ; National Aeronautics and Space Administration
语种: 英语
WOS记录号: WOS:000375006700004
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16192
Appears in Collections:分子云与恒星形成研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
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