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Gas kinematics and star formation in the filamentary molecular cloud G47.06+0.26
Xu, Jin-Long; Xu, Ye; Zhang, Chuan-Peng; Liu, Xiao-Lan; Yu, Naiping; Ning, Chang-Chun; Ju, Bing-Gang
2018
发表期刊ASTRONOMY & ASTROPHYSICS
卷号609页码:A43
摘要Aims. We performed a multi-wavelength study toward the filamentary cloud G47.06 + 0.26 to investigate the gas kinematics and star formation.Methods. We present the (CO)-C-12 (J = 1-0), (CO)-C-13 (J = 1-0) and (CO)-O-18 (J = 1-0) observations of G47.06 + 0.26 obtained with the Purple Mountain Observation (PMO) 13.7 m radio telescope to investigate the detailed kinematics of the filament. Radio continuum and infrared archival data were obtained from the NRAO VLA Sky Survey (NVSS), the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL), the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) survey, and the Multi-band Imaging Photometer Survey of the Galaxy (MIPSGAL). To trace massive clumps and extract young stellar objects in G47.06 + 0.26, we used the BGPS catalog v2.0 and the GLIMPSE I catalog, respectively.Results. The (CO)-C-12 (J = 1-0) and (CO)-C-13 (J = 1-0) emission of G47.06 + 0.26 appear to show a filamentary structure. The filament extends about 45' (58.1 pc) along the east-west direction. The mean width is about 6.8 pc, as traced by the (CO)-C-13 (J = 1 0) emission. G47.06 + 0.26 has a linear mass density of similar to 361.5 M-circle dot pc(-1). The external pressure (due to neighboring bubbles and HII regions) may help preventing the filament from dispersing under the effects of turbulence. From the velocity-field map, we discern a velocity gradient perpendicular to G47.06 + 0.26. From the Bolocam Galactic Plane Survey (BGPS) catalog, we found nine BGPS sources in G47.06 + 0.26, that appear to these sources have sufficient mass to form massive stars. We obtained that the clump formation efficiency (CFE) is similar to 18% in the filament. Four infrared bubbles were found to be located in, and adjacent to, G47.06 + 0.26. Particularly, infrared bubble N98 shows a cometary structure. CO molecular gas adjacent to N98 also shows a very intense emission. HII regions associated with infrared bubbles can inject the energy to surrounding gas. We calculated the kinetic energy, ionization energy, and thermal energy of two HII regions in G47.06 + 0.26. From the GLIMPSE I catalog, we selected some Class I sources with an age of similar to 10(5) yr, which are clustered along the filament. The feedback from the HII regions may cause the formation of a new generation of stars in filament G47.06 + 0.26.
语种英语
WOS记录号WOS:000419994200011
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文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/18070
专题紫金山天文台青海观测站
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Xu, Jin-Long,Xu, Ye,Zhang, Chuan-Peng,et al. Gas kinematics and star formation in the filamentary molecular cloud G47.06+0.26[J]. ASTRONOMY & ASTROPHYSICS,2018,609:A43.
APA Xu, Jin-Long.,Xu, Ye.,Zhang, Chuan-Peng.,Liu, Xiao-Lan.,Yu, Naiping.,...&Ju, Bing-Gang.(2018).Gas kinematics and star formation in the filamentary molecular cloud G47.06+0.26.ASTRONOMY & ASTROPHYSICS,609,A43.
MLA Xu, Jin-Long,et al."Gas kinematics and star formation in the filamentary molecular cloud G47.06+0.26".ASTRONOMY & ASTROPHYSICS 609(2018):A43.
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