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Molecular environs and triggered star formation around the large Galactic infrared bubble N 24
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; Sailanbek, Serikbek1,2,5; Li, Dalei1,3; Alimbetova, Dina5
2019-08-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume487Issue:2Pages:1517-1528
Corresponding AuthorLi, Xu(lixu@xao.ac.cn) ; Esimbek, Jarken(jarken@xao.ac.cn)
AbstractA 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.
Keywordstars: formation stars: massive ISM: bubbles HII region ISM: individual objects: (N 24)
DOI10.1093/mnras/stz1269
WOS KeywordH-II REGIONS ; DARK CLOUDS ; DENSE CORES ; OUTFLOWS ; BORDERS ; CO ; ATLASGAL ; COLLECT ; AMMONIA ; PROJECT
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000474919700003
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27292
Collection中国科学院紫金山天文台
Corresponding AuthorLi, Xu; Esimbek, Jarken
Affiliation1.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
Recommended Citation
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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