Institutional Repository of Radio Astronomy Research Laboratory
| ALMA observations of CH3COCH3 and the related species CH3CHO, CH3OH, and C2H5CN in line-rich molecular cores | |
Li, Chuanshou1; Qin, Sheng-Li1; Liu, Tie2; Liu, Xunchuan2; Li, Xiaohu3 ; Chen, Li1; Liu, Hong-Li1; Xu, Fengwei4,5; Liu, Meizhu6; Tang, Mengyao7; Shi, Hongqiong1; Zhang, Tianwei8,9; Wu, Yuefang5
| |
| 2025-03-28 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
 |
| ISSN | 0004-6361 |
| Volume | 696Pages:A7 |
| Contribution Rank | 3 |
| Abstract | Context. Acetone (CH3COCH3) is a carbonyl-bearing complex organic molecule, yet interstellar observations of acetone remain limited. Studying the formation and distribution of CH3COCH3 in the interstellar medium can provide valuable insights into prebiotic chemistry and the evolution of interstellar molecules. Aims. We explore the spatial distribution of CH3COCH3 and its correlation with the O-bearing molecules acetaldehyde (CH3CHO) and methanol (CH3OH), as well as the N-bearing molecule ethyl cyanide (C2H5CN), in massive protostellar clumps. Methods. We observed 11 massive protostellar clumps using ALMA at 345 GHz, with an angular resolution of 0.7 ''-1.0 ''. Spectral line transitions were identified using the eXtended CASA Line Analysis Software Suite. We constructed integrated intensity maps of CH3COCH3, CH3CHO, CH3OH, and C2H5CN and derived their rotation temperatures, column densities, and abundances under the assumption of local thermodynamic equilibrium. Results. CH3COCH3 is detected in 16 line-rich cores from 9 massive protostellar clumps: 12 high-mass cores (core mass >8 M-circle dot), 3 intermediate-mass cores (2-8 M-circle dot), and 1 low-mass core (<2 M-circle dot). CH3CHO and CH3OH are also detected in all 16 cores, while C2H5CN is detected in 15. The integrated intensity maps reveal similar spatial distributions for CH3COCH3, CH3CHO, CH3OH, and C2H5CN. The line emission peaks of all four molecules coincide with the continuum emission peaks in regions without ultra-compact HII regions. Significant correlations are observed in the abundances of these molecules, which also exhibit similar average temperatures. Conclusions. Our observational results, supported by chemical models, suggest that CH3COCH3, CH3CHO, and CH3OH originate from the same gas. The observed temperatures and abundances of CH3COCH3 are consistent with model predictions involving grain surface chemistry. |
| Keyword | astrochemistry line: identification stars: formation ISM: abundances ISM: molecules |
| DOI | 10.1051/0004-6361/202452810 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | COMPLEX ORGANIC-MOLECULES ; STAR-FORMING REGIONS ; 3-MILLIMETER OBSERVATIONS ; INTERSTELLAR ACETONE ; MASS PROTOSTARS ; HOT CORINO ; N-BEARING ; CHEMISTRY ; SEARCH ; MILLIMETER |
| Funding Project | National Key R&D Program of China ; NSFC[12073061] ; NSFC[12122307] ; NSFC[12103045] ; NSFC[12473025] ; Xinjiang Uygur Autonomous Region of China ; Yunnan Fundamental Research Project[202301AT070118] ; Yunnan Fundamental Research Project[202401AS070121] ; International partnership program of Chinese Academy of Sciences[114231KYSB20200009] ; International partnership program of Chinese Academy of Sciences[20PJ1415500] ; Deutsche Forschungsgemeinschaft (DFG)[956] ; [2022YFA1603101] ; [12033005] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001455406500006 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | National Key R&D Program of China ; NSFC ; Xinjiang Uygur Autonomous Region of China ; Yunnan Fundamental Research Project ; International partnership program of Chinese Academy of Sciences ; Deutsche Forschungsgemeinschaft (DFG) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7561 |
| Collection | 射电天文研究室_天体化学研究团组 |
| Corresponding Author | Li, Chuanshou; Qin, Sheng-Li; Liu, Tie |
| Affiliation | 1.Yunnan Univ, Sch Phys & Astron, Kunming 650091, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 831399, Peoples R China 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 5.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 6.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China 7.Chuxiong Normal Univ, Inst Astrophys, Sch Phys & Elect Sci, Chuxiong 675000, Peoples R China 8.Univ Cologne, I Phys Inst, Zulpicher Str 77, D-50937 Cologne, Germany 9.Res Ctr Intelligent Comp Platforms, Zhejiang Lab, Hangzhou 311100, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Chuanshou,Qin, Sheng-Li,Liu, Tie,et al. ALMA observations of CH3COCH3 and the related species CH3CHO, CH3OH, and C2H5CN in line-rich molecular cores[J]. ASTRONOMY & ASTROPHYSICS,2025,696:A7. |
| APA | Li, Chuanshou.,Qin, Sheng-Li.,Liu, Tie.,Liu, Xunchuan.,Li, Xiaohu.,...&Wu, Yuefang.(2025).ALMA observations of CH3COCH3 and the related species CH3CHO, CH3OH, and C2H5CN in line-rich molecular cores.ASTRONOMY & ASTROPHYSICS,696,A7. |
| MLA | Li, Chuanshou,et al."ALMA observations of CH3COCH3 and the related species CH3CHO, CH3OH, and C2H5CN in line-rich molecular cores".ASTRONOMY & ASTROPHYSICS 696(2025):A7. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Li-2025-ALMA observa（1845KB） | 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