JCMT observations of CO, SO2, and a U-line in circumstellar envelopes of four O-rich AGB stars
文献类型：期刊论文
| 作者 | Feng, Yanan2,4; Li, Xiaohu1,3,4; Qin, Sheng-Li6; Millar, Tom J.5; Szczerba, Ryszard3,4; Miao, Zhenzhen3,4; Tuo, Juan3,4 |
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2025-06-01 |
| 卷号 | 34期号:6页码:069701 |
| 关键词 | asymptotic giant branch circumstellar envelopes SO2 97.10.Fy |
| ISSN号 | 1674-1056 |
| DOI | 10.1088/1674-1056/adbedc |
| 产权排序 | 3 |
| 英文摘要 | The circumstellar envelopes (CSE) of asymptotic giant branch (AGB) stars are abundant in molecular emissions, offering valuable insights into the physical and chemical conditions of these evolving stars. In this paper, we report observations of two molecules (CO and SO2) toward four O-rich AGB stars using the James Clerk Maxwell Telescope (JCMT). We detected an unusual SO2 spectral feature comprising both broad and narrow components in IK Tau and AP Lyn. The broad line profiles may originate from thermal molecular emission, while the narrow profiles could come from other species (or masers) or astrophysical phenomena occurring within the CSEs of the AGB stars, such as episodic mass loss, bipolar outflows, or emissions associated with the complex physical processes near the central star. The narrow lines of SO2 may also arise from vibrationally excited emissions. Additionally, we observed the same U-line in both TX Cam and IK Tau, which may originate from the molecule N17O. We analyzed the identified molecular lines using rotational diagrams to determine their excitation temperatures, column densities, and fractional abundances. This information aids in the constructing of reliable astrochemical models for a more detailed examination of the target stars. The narrow component of the SO2 line suggests unusual astrophysical phenomena, making IK Tau and AP Lyn particularly intriguing for further investigation to fully understand the physical processes at play in these sources. |
| WOS关键词 | MASS-LOSS ; MOLECULAR COMPOSITION ; CHEMISTRY ; SULFUR ; CARBON ; WIND |
| 资助项目 | Natural Science Foundation of Xinjiang Uygur Autonomous Region, China[2022D01B221] ; National Natural Science Foundation of China[12473025] ; TJM's Research at QUB[ST/T000198/1] ; STFC ; Korea Astronomy and Space Science Institute ; National Key Research and Development Program of China[2017YFA0402700] ; Science and Technology Facilities Council of the United Kingdom ; JCMT[M22BP013] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001513711400001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Natural Science Foundation of Xinjiang Uygur Autonomous Region, China ; National Natural Science Foundation of China ; TJM's Research at QUB ; STFC ; Korea Astronomy and Space Science Institute ; National Key Research and Development Program of China ; Science and Technology Facilities Council of the United Kingdom ; JCMT |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7861]  |
| 专题 | 天体化学研究团组 |
| 通讯作者 | Li, Xiaohu |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Shenyang 100049, Peoples R China 3.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Xinjiang Uygur, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang Uygur, Peoples R China 5.Queens Univ Belfast, Astrophys Res Ctr, Sch Math & Phys, Belfast BT7 1NN, North Ireland 6.Yunnan Univ, Dept Astron, Kunming 650091, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, Yanan,Li, Xiaohu,Qin, Sheng-Li,et al. JCMT observations of CO, SO2, and a U-line in circumstellar envelopes of four O-rich AGB stars[J]. CHINESE PHYSICS B,2025,34(6):069701. |
| APA | Feng, Yanan.,Li, Xiaohu.,Qin, Sheng-Li.,Millar, Tom J..,Szczerba, Ryszard.,...&Tuo, Juan.(2025).JCMT observations of CO, SO2, and a U-line in circumstellar envelopes of four O-rich AGB stars.CHINESE PHYSICS B,34(6),069701. |
| MLA | Feng, Yanan,et al."JCMT observations of CO, SO2, and a U-line in circumstellar envelopes of four O-rich AGB stars".CHINESE PHYSICS B 34.6(2025):069701. |
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