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Star formation in IRDC G31.97+0.07

文献类型：期刊论文

作者Zhou, Chenlin1,2,3; Zhu, Ming1,3; Yuan, Jinghua1; Wu, Yuefang4; Yuan, Lixia1,2,3; Moore, T. J. T.5; Eden, D. J.5
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2019-05-01
卷号485期号:3页码:3334-3351
关键词stars: formation ISM: clouds ISM: kinematics and dynamics ISM: structure
ISSN号0035-8711
DOI10.1093/mnras/stz603
英文摘要We utilize multiple-waveband continuum and molecular-line data of CO isotopes to study the dynamical structure and physical properties of the IRDC G31.97+0.07. We derive the dust temperature and H-2 column density maps of the whole structure by spectral energy distribution fitting. The total mass is about 2.5 x 10(5)M(circle dot) for the whole filamentary structure and about 7.8 x 10(4) M-circle dot for the infrared dark cloud (IRDC). Column density probability distribution functions (PDFs) produced from the column density map are generally in the power-law form, suggesting that this part is mainly gravity dominant. The flatter slope of the PDF of the IRDC implies that it might be compressed by an adjacent, larger H II region. There are 27 clumps identified from the 850 mu m continuum located in this filamentary structure. Based on the average spacing of the fragments in the IRDC, we estimate the age of the IRDC. The age is about 6.4 Myr, assuming inclination angle i = 30 degrees. For 18 clumps with relatively strong CO and (CO)-C-13 (3-2) emission, we study their line profiles and stabilities. We find five clumps with blue profiles that indicate gas infall motion and two clumps with red profiles that indicate outflows or expansion. Only one clump has alpha(vir) > 2, suggesting that most clumps are gravitationally bound and tend to collapse. In the mass-Re-q diagram, 23 of 27 clumps are above the threshold for high-mass star formation, suggesting that this region can be a good place for studying high-mass star forming.
WOS关键词INFRARED DARK CLOUDS ; DENSITY PROBABILITY-DISTRIBUTION ; CANDIDATE MASSIVE YSOS ; MOLECULAR CLOUDS ; GALACTIC PLANE ; RMS SURVEY ; STELLAR ; FRAGMENTATION ; TURBULENCE ; STABILITY
资助项目China Ministry of Science and Technology under the State RD Program[2017YFA0402600] ; NSFC[U1531246] ; NSFC[11503035] ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Canada Foundation for Innovation ; NASA
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000474902000026
出版者OXFORD UNIV PRESS
资助机构China Ministry of Science and Technology under the State RD Program ; China Ministry of Science and Technology under the State RD Program ; NSFC ; NSFC ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; NASA ; NASA ; China Ministry of Science and Technology under the State RD Program ; China Ministry of Science and Technology under the State RD Program ; NSFC ; NSFC ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; NASA ; NASA ; China Ministry of Science and Technology under the State RD Program ; China Ministry of Science and Technology under the State RD Program ; NSFC ; NSFC ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; NASA ; NASA ; China Ministry of Science and Technology under the State RD Program ; China Ministry of Science and Technology under the State RD Program ; NSFC ; NSFC ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of FAST, NAOC, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; NASA ; NASA
源URL[http://ir.bao.ac.cn/handle/114a11/26918]  
专题中国科学院国家天文台
通讯作者Zhou, Chenlin; Zhu, Ming
作者单位1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, NAOC, Key Lab FAST, Beijing 100012, Peoples R China
4.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
5.Liverpool John Moores Univ, Astrophys Res Inst, IC2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
推荐引用方式
GB/T 7714		 Zhou, Chenlin,Zhu, Ming,Yuan, Jinghua,et al. Star formation in IRDC G31.97+0.07[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,485(3):3334-3351.
APA Zhou, Chenlin.,Zhu, Ming.,Yuan, Jinghua.,Wu, Yuefang.,Yuan, Lixia.,...&Eden, D. J..(2019).Star formation in IRDC G31.97+0.07.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,485(3),3334-3351.
MLA Zhou, Chenlin,et al."Star formation in IRDC G31.97+0.07".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485.3(2019):3334-3351.

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