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| Evidence for Core-Core Collision in Barnard 68 | |
Li, Dalei1,2,3 ; Henkel, Christian1,4; Kraus, Alexander4; Tang, Xindi1,2,3,5; Baan, Willem1; Esimbek, Jarken1,2,3,5; Wang, Ke6; Wu, Gang1,3; Liu, Tie7; Sobolev, Andrej M.1,8; Zhou, Jianjun1,3,5; He, Yuxin1,2,3; Komesh, Toktarkhan9,10
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| 2025-06-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| ISSN | 0004-637X |
| Volume | 985Issue:2Pages:7 |
| Abstract | The prestellar core Barnard 68 (B68) is a prototypical source to study the initial conditions and chemical processes of star formation. A previous numerical simulation suggested the southeastern bullet is impacting on the main body of B68. In order to obtain more observational evidence, mapping observations of the ground state SO (10-01) emission line at 30 GHz were made with the Effelsberg 100 m telescope. Based on the velocity field and channel maps derived from SO, three velocity components were clearly detected. The velocity field of the main body indicates rotation and is well fitted by a solid-body rotation model. The measured radial velocity difference between the bullet and the main core is about 0.4 km s-1, which is almost equal to the velocity obtained by the previous numerical simulation. Therefore, the bullet is most likely impacting on the rotating main body of B68. A 1D spherical non-local thermodynamic equilibrium Monte Carlo radiation transfer RATRAN code is performed to derive the radial abundance profile of SO by analyzing the observed velocity-integrated intensity. SO is depleted inside a 60 '' (0.02 pc) radius from the core. The abundance stays constant at 2.0 x 10-9 for radii larger than 60 '' from the center of the main core. The abundance is enhanced at the interface of the bullet and the main core, indicating that shock waves were produced by the collision between the bullet and the main core. In conclusion, based on the kinematical and chemical analysis, our observational results support the previously proposed core-core collision scenario in B68. |
| Corresponding Author | Li, Dalei(lidalei@xao.ac.cn) |
| DOI | 10.3847/1538-4357/add326 |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| WOS Keyword | ORION KL ; INTERNAL STRUCTURE ; SULFUR MONOXIDE ; STARLESS CORES ; DARK CLOUDS ; LINE SURVEY ; EXTINCTION ; OSCILLATIONS ; EXCITATION ; GAS |
| Funding Project | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[2022YFA1603103] ; National Key R&D Program of China ; Youth Innovation Promotion Association CAS[12173075] ; Youth Innovation Promotion Association CAS[12373029] ; National Natural Science foundation of China (NSFC)[xbzg-zdsys-202212] ; Chinese Academy of Sciences Light of West China Program[2022TSYCLJ00055] ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region[2022D01E06] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Tianshan Talent Training Program[2022E01050] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[2023D04033] ; Xinjiang Key Laboratory of Radio Astrophysics[2020-XBQNXZ-017] ; Chinese Academy of Sciences (CAS) Light of West China Program[AP26102915] ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan[2025PVA0048] ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan[2024VMA0002] ; Tianchi Talent Program of Xinjiang Uygur autonomous region - Chinese Academy of Sciences President's International Fellowship Initiative grant[FEUZ-2023-0019] ; Ministry of Science and Higher Education of the Russian Federation |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001498048100001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; National Key R&D Program of China ; Youth Innovation Promotion Association CAS ; National Natural Science foundation of China (NSFC) ; Chinese Academy of Sciences Light of West China Program ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Tianshan Talent Training Program ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region ; Xinjiang Key Laboratory of Radio Astrophysics ; Chinese Academy of Sciences (CAS) Light of West China Program ; Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan ; Tianchi Talent Program of Xinjiang Uygur autonomous region - Chinese Academy of Sciences President's International Fellowship Initiative grant ; Ministry of Science and Higher Education of the Russian Federation |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7784 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 |
| Corresponding Author | Li, Dalei |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China 4.Max Planck Inst Radioastron, Auf dem Hugel 69, D-53121 Bonn, Germany 5.Chinese Acad Sci, Key Lab Radio Astron & Technol, A20 Datun Rd, Beijing 100101, Peoples R China 6.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 7.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 8.Ural Fed Univ, 19 Mira St, Ekaterinburg 620002, Russia 9.Nazarbayev Univ, Energet Cosmos Lab, Astana 010000, Kazakhstan 10.Al Farabi Kazakh Natl Univ, Inst Expt & Theoret Phys, Alma Ata 050040, Kazakhstan |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Li, Dalei,Henkel, Christian,Kraus, Alexander,et al. Evidence for Core-Core Collision in Barnard 68[J]. ASTROPHYSICAL JOURNAL,2025,985(2):7. |
| APA | Li, Dalei.,Henkel, Christian.,Kraus, Alexander.,Tang, Xindi.,Baan, Willem.,...&Komesh, Toktarkhan.(2025).Evidence for Core-Core Collision in Barnard 68.ASTROPHYSICAL JOURNAL,985(2),7. |
| MLA | Li, Dalei,et al."Evidence for Core-Core Collision in Barnard 68".ASTROPHYSICAL JOURNAL 985.2(2025):7. |
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