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PMO OpenIR  > 太阳活动的多波段观测研究团组  > 期刊论文
题名: GAS KINEMATICS AND STAR FORMATION IN THE FILAMENTARY IRDC G34.43+0.24
作者: Xu, Jin-Long1, 2; Li, Di1; Zhang, Chuan-Peng1, 2; Liu, Xiao-Lan1, 2; Wang, Jun-Jie1, 2; Ning, Chang-Chun2, 3; Ju, Bing-Gang4, 5
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2016-03-10
卷号: 819, 期号:2
关键词: ISM: clouds
DOI: 10.3847/0004-637X/819/2/117
文章类型: Article
英文摘要: We performed a multiwavelength study toward the infrared dark cloud (IRDC) G34.43+0.24. New maps of Co-13 J = 1-0 and (CO)-O-18 J = 1-0 were obtained from the Purple Mountain Observatory (PMO) 13.7 m radio telescope. At 8 mu m (Spitzer-IRAC), IRDC G34.43+0.24 appears to be a dark filament extended by 18' along the north south direction. Based on the association with the 870 pm and (CO)-O-18 J = 1-0 emission, we suggest that IRDC G34.43+0.24 should not be 18' in length, but extend to 34'. IRDC G34.43+0.24 contains some massive protostars, UC H II regions, and infrared bubbles. The spatial extend of IRDC G34.43+0.24 is about 37 pc, assuming a distance of 3.7 kpc. IRDC G34.43+0.24 has a linear mass density of similar to 1.6 x 10(3) M-circle dot pc 1, which is roughly consistent with its critical mass to length ratio. The turbulent motion may help stabilize the filament against the radial collapse. Both infrared bubbles N61 and N62 show a ringlike structure at 8 itm. In particular, N61 has a double-shell structure that has expanded into IRDC G34.43+0.24. The outer shell is traced by 8 pm and (CO)-C-13 J = 1-0 emission, while the inner shell is traced by 24 itm and 20 cm emission. We suggest that the outer shell (9.9 x 10(5) years) is created by the expansion of H II region G34.172+0.175, while the inner shell (4.1 similar to 6.3 x 10(5) years) may be produced by the energetic stellar wind of its central massive star. From the GLIMPSE I catalog, we selected some Class I sources with an age of 105 years. These Class I sources are clustered along the filamentary molecular cloud.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: INFRARED-DARK CLOUDS ; BUBBLING GALACTIC DISK ; YOUNG STELLAR OBJECTS ; IRAS POINT SOURCES ; ARRAY CAMERA IRAC ; H II REGIONS ; HII-REGIONS ; MILKY-WAY ; MOLECULAR OUTFLOWS ; MSXDC G034.43+00.24
收录类别: SCI
项目资助者: NASA ; National Natural Science Foundation of China(11363004 ; National Key Basic Research Program of China (973 Program)(2015CB857100) ; Guizhou Scientific Collaboration Program(20130421) ; (E-181.C-0885) ; (E-078.F-9040(A)) ; (M-079.C-9501(A)) ; (M-081.C-9501(A)) ; 11403042)
语种: 英语
WOS记录号: WOS:000372305700029
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16170
Appears in Collections:太阳活动的多波段观测研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.NAOC TU Joint Ctr Astrophys, Lhasa 850000, Peoples R China
3.Tibet Univ, Lhasa 850000, Tibet, Peoples R China
4.Purple Mt Observ, Qinghai Stn, Delingha 817000, Peoples R China
5.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100012, Peoples R China
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