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A case investigation of an end-dominated collapse and hub-filament system, G53

文献类型：期刊论文

作者Meng, Dezhao1,6; Esimbek, Jarken1,4,5,6; Henkel, Christian1,3,4; Zhou, Jianjun1,4,5,6; Wu, Gang1,3,6; Tang, Xindi1,4,5,6; Li, Dalei1,4,5,6; He, Yuxin1,4,5,6; Komesh, Toktarkhan2; Ma, Yingxiu1,4,5
刊名ASTRONOMY & ASTROPHYSICS
出版日期2025-09-12
卷号701页码:A155
关键词stars: formation ISM: kinematics and dynamics ISM: molecules ISM: structure
ISSN号0004-6361
DOI10.1051/0004-6361/202453390
产权排序1
英文摘要Aims. G53 is an active star formation region with approximately 300 young stellar object (YSO) candidates and exhibits a long filament in CO (V-LSR similar to 23 km s(-1)). To date, there has been no detailed study of its filament characteristics. We therefore explored the kinematics of the filament in the G53 region and the star formation activities triggered along it by combining data from various facilities. Methods. We primarily utilized archival (CO)-C-13 (1-0) data from the Galactic Ring Survey and NH3(1,1) observations from the Nanshan 26-meter radio telescope. Additionally, we incorporated (CO)-C-12 (3-2) data from the CO High-Resolution Survey, as well as infrared data from Spitzer and Herschel, to study the G53 region. NH3 (1,1) was used to trace the ends of the molecular cloud G53 (G53W and G53E), while (CO)-C-13 (1-0) was used to map the entire molecular cloud. We used CRISPY to identify the filament spine in the (CO)-C-13 (1-0) position-position-velocity cube. Position-velocity diagrams along the filament spine were analyzed to extract kinematic information. Numerical simulations of a turbulent filament were conducted for comparison with the observed kinematics of G53. Additionally, YSOs in G53 were collected to evaluate the star formation activity. Results. The velocity-integrated intensity map of (CO)-C-13 (1-0) and the H-2 column density map indicate that the filament G53 appears to be undergoing an end-dominated collapse (EDC) process. Position-velocity diagrams of (CO)-C-13 (1-0) show that in G53W, the clumps C2 and C4 are possibly moving toward each other while accreting surrounding material. Our numerical simulations of the EDC scenario indicate that an isothermal filament initially fragments into several clumps due to turbulence, which subsequently merge at the ends. This further adds to the credibility of our hypothesis regarding the approaching motion of C2 and C4 in G53W. NH3 signals are detected only in the G53W and G53E regions, with significantly stronger signals in G53W. In G53W, the NH3(14) data reveal a hub-filament system (HFS) centered around C2. The analysis of NH3(1,1) shows a strong correlation between the magnitude of the velocity gradient and the velocity dispersion in the G53W region, suggesting that the accumulation of material in this area contributes to large-scale turbulence. Additionally, C2, located at the center of the HFS, exhibits a higher star formation efficiency than other regions in G53.
WOS关键词VELOCITY-COHERENT FILAMENTS ; DENSE CORE FORMATION ; STAR-FORMATION ; MOLECULAR CLOUD ; HI-GAL ; GLOBAL COLLAPSE ; INFALL MOTIONS ; ARRAY CAMERA ; HIGH-MASS ; HERSCHEL
资助项目the CAS Light of West China Program[2023YFA1608002] ; the CAS Light of West China Program[2022YFA1603103] ; National Key R&D Program of China[2024TSYCTD0013] ; Tianshan Talent Training Program[2022E0105] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12173075] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[11973076] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12103082] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12403033] ; NSFC[2022D01E06] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2021-XBQNXZ-028] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[XBZG-ZDSYS-202212] ; CAS Light of West China Program[2022D04033] ; Xinjiang Key Laboratory of Radio Astrophysics[2022TSYCLJ0005] ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Youth Innovation Promotion Association CAS[AST-9800334] ; Youth Innovation Promotion Association CAS[AST-0098562] ; Youth Innovation Promotion Association CAS[AST-0100793] ; Xinjiang Uyghur Autonomous Region - National Science Foundation[2024VMA0002] ; Chinese Academy of Sciences President's International Fellowship Initiative[FEUZ-2023-0019] ; Ministry of Science and Higher Education of the Russian Federation
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001571405400017
出版者EDP SCIENCES S A
资助机构the CAS Light of West China Program ; National Key R&D Program of China ; Tianshan Talent Training Program ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region ; NSFC ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; CAS Light of West China Program ; Xinjiang Key Laboratory of Radio Astrophysics ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Youth Innovation Promotion Association CAS ; Xinjiang Uyghur Autonomous Region - National Science Foundation ; Chinese Academy of Sciences President's International Fellowship Initiative ; Ministry of Science and Higher Education of the Russian Federation
源URL[http://ir.xao.ac.cn/handle/45760611-7/8178]  
专题恒星形成与演化研究团组
通讯作者Meng, Dezhao; Esimbek, Jarken; Henkel, Christian
作者单位1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
2.Nazarbayev Univ, Energet Cosmos Lab, Astana 010000, Kazakhstan
3.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany
4.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China
5.State Key Lab Radio Astron & Technol, A20 Datun Rd, Beijing 100101, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100080, Peoples R China
7.Netherlands Inst Radio Astron, ASTRON, NL-7991 PD Dwingeloo, Netherlands
8.Ural Fed Univ, 19 Mira St, Ekaterinburg 620002, Russia
9.Al Farabi Kazakh Natl Univ, Fac Phys & Technol, Dept Elect & Astrophys, Alma Ata 050040, Kazakhstan
推荐引用方式
GB/T 7714		 Meng, Dezhao,Esimbek, Jarken,Henkel, Christian,et al. A case investigation of an end-dominated collapse and hub-filament system, G53[J]. ASTRONOMY & ASTROPHYSICS,2025,701:A155.
APA Meng, Dezhao.,Esimbek, Jarken.,Henkel, Christian.,Zhou, Jianjun.,Wu, Gang.,...&Jandaolet, Qaynar.(2025).A case investigation of an end-dominated collapse and hub-filament system, G53.ASTRONOMY & ASTROPHYSICS,701,A155.
MLA Meng, Dezhao,et al."A case investigation of an end-dominated collapse and hub-filament system, G53".ASTRONOMY & ASTROPHYSICS 701(2025):A155.

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来源：新疆天文台

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