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Molecular environs and triggered star formation around the large Galactic infrared bubble N 24

文献类型：期刊论文

作者Li, Xu1,2; Esimbek, Jarken1,3; Zhou, Jianjun1,3; Baan, W. A.1,4; Ji, Weiguang1; Tang, Xindi1,3; Wu, Gang1,3; Tang, Xiaoke1,2; Li, Qiang1,2; Ma, Yingxiu1
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2019-08-01
卷号487期号:2页码:1517-1528
ISSN号0035-8711
关键词stars: formation stars: massive ISM: bubbles HII region ISM: individual objects: (N 24)
DOI10.1093/mnras/stz1269
通讯作者Li, Xu(lixu@xao.ac.cn) ; Esimbek, Jarken(jarken@xao.ac.cn)
英文摘要A multi-wavelength analysis of the large Galactic infrared bubble N24 is presented in this paper in order to investigate the molecular and star-formation environment around expanding HII regions. Using archival data from Herschel and ATLASGAL, the distribution and physical properties of the dust over the entire bubble are studied. Using the Clumpfind2d algorithm, 23 dense clumps are identified, with sizes and masses in the range 0.65-1.73 pc and 600-16 300 M-circle dot, respectively. To analyse the molecular environment in N24, observations of NH3 (1,1) and (2,2) were carried out using the Nanshan 26-m radio telescope. Analysis of the kinetic temperature and gravitational stability of these clumps suggests gravitational collapse in several of them. The mass-size distributions of the clumps and the presence of massive young protostars indicate that the shell of N24 is a region of ongoing massive-star formation. The compatibility of the dynamical and fragmentation timescales and the overabundance of young stellar objects and clumps on the rim suggest that the 'collect-and-collapse' mechanism is in play at the boundary of the bubble, but the existence of the infrared dark cloud at the edge of bubble indicates that a 'radiation-driven implosion' mechanism may also have played a role there.
WOS关键词H-II REGIONS ; DARK CLOUDS ; DENSE CORES ; OUTFLOWS ; BORDERS ; CO ; ATLASGAL ; COLLECT ; AMMONIA ; PROJECT
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000474919700003
源URL[http://libir.pmo.ac.cn/handle/332002/27291]  
专题中国科学院紫金山天文台
通讯作者Li, Xu; Esimbek, Jarken
作者单位1.Chinese Acad Sci, Xinjiang Astron Observ, 150,Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China
4.Netherlands Inst Radio Astron, NL-7991 PD Dwingeloo, Netherlands
5.Al Farabi Kazakh Natl Univ, Fac Phys & Technol, Dept Solid State Phys & Nonlinear Phys, Alma Ata 050040, Kazakhstan
推荐引用方式
GB/T 7714		 Li, Xu,Esimbek, Jarken,Zhou, Jianjun,et al. Molecular environs and triggered star formation around the large Galactic infrared bubble N 24[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,487(2):1517-1528.
APA Li, Xu.,Esimbek, Jarken.,Zhou, Jianjun.,Baan, W. A..,Ji, Weiguang.,...&Alimbetova, Dina.(2019).Molecular environs and triggered star formation around the large Galactic infrared bubble N 24.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,487(2),1517-1528.
MLA Li, Xu,et al."Molecular environs and triggered star formation around the large Galactic infrared bubble N 24".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 487.2(2019):1517-1528.

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