PMO OpenIR  > 分子云与恒星形成研究团组
Structures of GMC W 37
Zhan, Xiao-Liang; Jiang, Zhi-Bo1; Chen, Zhi-Wei; Zhang, Miao-Miao; Song, Chao
2016-04-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume16Issue:4
AbstractWe 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.
KeywordIsm: Clouds Ism: Structure Ism: Kinematics And Dynamics Ism: Individual Objects (W37, M16)
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1674-4527/16/4/056
WOS KeywordYOUNG STELLAR OBJECTS ; EAGLE NEBULA ; MILKY-WAY ; STAR-FORMATION ; MASSIVE STARS ; MOLECULAR CLOUDS ; SPIRAL ARMS ; NGC-6611 ; FILAMENTS ; CREATION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000375006700004
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16202
Collection分子云与恒星形成研究团组
Affiliation1.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
Recommended Citation
GB/T 7714
Zhan, Xiao-Liang,Jiang, Zhi-Bo,Chen, Zhi-Wei,et al. Structures of GMC W 37[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(4).
APA Zhan, Xiao-Liang,Jiang, Zhi-Bo,Chen, Zhi-Wei,Zhang, Miao-Miao,&Song, Chao.(2016).Structures of GMC W 37.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(4).
MLA Zhan, Xiao-Liang,et al."Structures of GMC W 37".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.4(2016).
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