Institutional Repository of Radio Astronomy Research Laboratory
| Kinematics and star formation of hub-filament systems in W49A | |
Zhang, Wenjun1,2; Zhou, Jianjun1,3,4 ; Esimbek, Jarken1,3,4; Baan, Willem1,5; He, Yuxin1,2,3,4; Tang, Xindi1,2,3,4; Li, Dalei1,2,3,4; Ji, Weiguang1; Wu, Gang1,6; Ma, Yingxiu1; Li, Jiasheng1,2; Zhou, Dongdong1; Tursun, Kadirya1; Komesh, Toktarkhan7,8
| |
| 2024-08-08 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
 |
| ISSN | 0004-6361 |
| Volume | 688Pages:A99 |
| Contribution Rank | 1 |
| Abstract | Aims. W49A is a prominent giant molecular cloud (GMC) that exhibits strong star formation activities, yet its structural and kinematic properties remain uncertain. Our study aims to investigate the large-scale structure and kinematics of W49A, and elucidate the role of filaments and hub-filament systems (HFSs) in its star formation activity. Methods. We utilized continuum data from Herschel and the James Clerk Maxwell Telescope (JCMT) as well as the molecular lines (CO)-C-12 (3-2), (CO)-C-13 (3-2), and (CO)-O-18 (3-2) to identify filaments and HFSs within W49A. Further analysis focused on the physical properties, kinematics, and mass transport within these structures. Additionally, recombination line emission from the H I/OH/Recombination (THOR) line survey was employed to trace the central H II region and ionized gas. Results. Our findings reveal that W49A comprises one blue-shifted (B-S) HFS and one red-shifted (R-S) HFS, each with multiple filaments and dense hubs. Notably, significant velocity gradients were detected along these filaments, indicative of material transport toward the hubs. High mass accretion rates along the filaments facilitate the formation of massive stars in the HFSs. Furthermore, the presence of V-shaped structures around clumps in position-velocity diagrams suggests ongoing gravitational collapse and local star formation within the filaments. Conclusions. Our results indicate that W49A consists of one R-S HFS and one B-S HFS, and that the material transport from filaments to the hub promotes the formation of massive stars in the hub. These findings underscore the significance of HFSs in shaping the star formation history of W49A. |
| Keyword | ISM: bubbles ISM: clouds evolution H II regions ISM: kinematics and dynamics ISM: structure |
| DOI | 10.1051/0004-6361/202348580 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | HI/OH/RECOMBINATION LINE SURVEY ; INFRARED DARK CLOUDS ; MOLECULAR CLOUD ; GRAVITATIONAL COLLAPSE ; ACCRETION FLOWS ; MASSIVE STARS ; HI-GAL ; REGION ; CATALOG ; FRAGMENTATION |
| Funding Project | National Key R&D Program of China[2022YFA1603103] ; National Key R&D Program of China[2023YFA1608002] ; National Natural Science foundation of China (NSFC)[12373029] ; National Natural Science foundation of China (NSFC)[12173075] ; National Natural Science foundation of China (NSFC)[12103082] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01E06] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01A359] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01A362] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2023D01A11] ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region[2022TSYCLJ0005] ; Tianchi Talents Program of Xinjiang Uygur Autonomous Region ; Chinese Academy of Sciences (CAS)[2020-XBQNXZ-017] ; Chinese Academy of Sciences (CAS)[2021-XBQNXZ-028] ; Chinese Academy of Sciences (CAS)[2022-XBJCTD-003] ; Chinese Academy of Sciences (CAS)[xbzg-zdsys-202212] ; Regional Collaborative Innovation Project of XinJiang Uyghur Autonomous Region[2022E01050] ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan[AP13067768] ; Chinese Academy of Sciences President International Fellowship Initiative[2023VMA0030] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001289290700014 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | National Key R&D Program of China ; National Natural Science foundation of China (NSFC) ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Tianchi Talents Program of Xinjiang Uygur Autonomous Region ; Chinese Academy of Sciences (CAS) ; Regional Collaborative Innovation Project of XinJiang Uyghur Autonomous Region ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan ; Chinese Academy of Sciences President International Fellowship Initiative |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6948 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 |
| Corresponding Author | Zhang, Wenjun; Zhou, Jianjun |
| Affiliation | 1.Chinese Acad Sci, XingJiang Astron Observ, Urumqi 830011, Peoples R China 2.Univ Chinese Acad Sci, ,, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 4.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China 5.ASTRON, Netherlands Inst Radio Astron, NL-7991 PD Dwingeloo, Netherlands 6.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 7.Nazarbayev Univ, Energet Cosmos Lab, Astana 010000, Kazakhstan 8.Al Farabi Kazakh Natl Univ, Fac Phys & Technol, Alma Ata 050040, Kazakhstan |
| Recommended Citation GB/T 7714 | Zhang, Wenjun,Zhou, Jianjun,Esimbek, Jarken,et al. Kinematics and star formation of hub-filament systems in W49A[J]. ASTRONOMY & ASTROPHYSICS,2024,688:A99. |
| APA | Zhang, Wenjun.,Zhou, Jianjun.,Esimbek, Jarken.,Baan, Willem.,He, Yuxin.,...&Komesh, Toktarkhan.(2024).Kinematics and star formation of hub-filament systems in W49A.ASTRONOMY & ASTROPHYSICS,688,A99. |
| MLA | Zhang, Wenjun,et al."Kinematics and star formation of hub-filament systems in W49A".ASTRONOMY & ASTROPHYSICS 688(2024):A99. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Zhang-2024-Kinematic（17773KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment