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Investigating the Globally Collapsing Hub-Filament Cloud G326.611+0.811

文献类型：期刊论文

作者He, Yu-Xin3,4,5,6; Liu, Hong-Li2; Tang, Xin-Di4,5,6; Qin, Sheng-Li2; Zhou, Jian-Jun4,5; Esimbek, Jarken4,5; Pan, Si-Rong2; Li, Da-Lei4,5,6; Zhao, Meng-Ke5,6; Ji, Wei-Guang4,5
刊名ASTROPHYSICAL JOURNAL
出版日期2023-11-01
卷号957期号:2页码:61
ISSN号0004-637X
DOI10.3847/1538-4357/acf766
产权排序1
英文摘要We present a dynamics study toward the G326.611+0.811 (G326) hub-filament system (HFS) cloud using new APEX observations of both (CO)-C-13 and (CO)-O-18 (J = 2-1). The G326 HFS cloud constitutes a central hub and at least four hub-composing filaments that are divided into a major branch of filaments (F1 and F2) and a side branch (F3-F5). The cloud holds ongoing high-mass star formation as characterized by three massive dense clumps (i.e., 370-1100 M-circle dot and 0.14-0.16 g cm(-2) for C1-C3) with high clump-averaged mass infalling rates (>10(-3) M-circle dot yr(-1)) within the major filament branch, and the associated point sources bright at 70 mu m, typical of young protostars. Along the five filaments, velocity gradients are found in both (CO)-C-13 and (CO)-O-18 (J = 2-1) emission, suggesting that filament-aligned gravitational collapse toward the central hub (i.e., C2) is responsible for the high-mass star formation therein. Moreover, a periodic velocity oscillation along the major filament branch is revealed in both (CO)-C-13 and (CO)-O-18 (J = 2-1) emission with a characteristic wavelength of similar to 3.5 pc and an amplitude of similar to 0.31-0.38 km s(-1). We suggest that this pattern of velocity oscillation in G326 could arise from clump-forming gas motion induced by gravitational instabilities. The prevalent velocity gradients, fragmentation of the major branch of filaments, and the ongoing collapse of the three massive dense clumps are indicative that G326 is an HFS undergoing global collapse.
WOS关键词VELOCITY-COHERENT FILAMENTS ; COMPACT SOURCE CATALOG ; STAR-FORMING REGIONS ; INFRARED DARK CLOUDS ; 1ST DATA RELEASE ; HI-GAL ; HIGH-MASS ; CLUSTER-FORMATION ; HERSCHEL ; CLUMPS
资助项目CAS divided by West Light Foundation, Chinese Academy of Sciences (West Light Foundation of CAS)https://doi.org/10.13039/501100013494[2020-XBQNXZ-017] ; Chinese Academy of Sciences (CAS) Light of West China Program[2023D04033] ; Xinjiang Key Laboratory of Radio Astrophysics[12103045] ; National Natural Science Foundation of China (NSFC)[2022YFA1603103] ; National Key R&D Program of China[2022-XBJCTD-003] ; CAS Light of West China Program[11973076] ; CAS Light of West China Program[12173075] ; NSFC[2022D01E06] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022TSYCLJ0005] ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region[2022E01050] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[AP13067768] ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001122392600001
出版者IOP Publishing Ltd
资助机构CAS divided by West Light Foundation, Chinese Academy of Sciences (West Light Foundation of CAS)https://doi.org/10.13039/501100013494 ; Chinese Academy of Sciences (CAS) Light of West China Program ; Xinjiang Key Laboratory of Radio Astrophysics ; National Natural Science Foundation of China (NSFC) ; National Key R&D Program of China ; CAS Light of West China Program ; NSFC ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan
源URL[http://ir.xao.ac.cn/handle/45760611-7/5649]  
专题恒星形成与演化研究团组
通讯作者He, Yu-Xin; Liu, Hong-Li
作者单位1.Al Farabi Kazakh Natl Univ, Fac Phys & Technol, Alma Ata 050040, Kazakhstan
2.Yunnan Univ, Sch Phys & Astron, Kunming 650091, Peoples R China
3.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Nazarbayev Univ, Energet Cosmos Lab, Nur Sultan 010000, Kazakhstan
推荐引用方式
GB/T 7714		 He, Yu-Xin,Liu, Hong-Li,Tang, Xin-Di,et al. Investigating the Globally Collapsing Hub-Filament Cloud G326.611+0.811[J]. ASTROPHYSICAL JOURNAL,2023,957(2):61.
APA He, Yu-Xin.,Liu, Hong-Li.,Tang, Xin-Di.,Qin, Sheng-Li.,Zhou, Jian-Jun.,...&Komesh, Toktarkhan.(2023).Investigating the Globally Collapsing Hub-Filament Cloud G326.611+0.811.ASTROPHYSICAL JOURNAL,957(2),61.
MLA He, Yu-Xin,et al."Investigating the Globally Collapsing Hub-Filament Cloud G326.611+0.811".ASTROPHYSICAL JOURNAL 957.2(2023):61.

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来源：新疆天文台

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