Institutional Repository of Radio Astronomy Research Laboratory
| Observations of Molecular CN toward S-type Asymptotic Giant Branch Stars | |
Feng, Yanan1,2 ; Li, Xiaohu1,3,9; Yang, Xiaofeng1,3,9; Millar, Tom J.4; Szczerba, Ryszard1,3,5; Qin, Sheng-Li6; Jiang, Xuejian7; Quan, Donghui1,7; Tuo, Juan1,3; Miao, Zhenzhen1,3; Liu, Sheng-Yuan8; Liu, Xiang1,3,9
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| 2024-12-01 | |
| Source Publication | ASTRONOMICAL JOURNAL
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| ISSN | 0004-6256 |
| Volume | 168Issue:6Pages:285 |
| Contribution Rank | 1 |
| Abstract | S-type asymptotic giant branch (AGB) stars are defined by their carbon-to-oxygen (C/O) ratio approaching unity. However, observations of circumstellar molecules in these stars are limited and challenging. In this study, we used the James Clerk Maxwell Telescope to search for cyanide (CN) in 12 selected S-type AGB stars, with only 4 of these stars displaying CN spectral line signals. The column density and fractional abundance of CN were calculated assuming local thermodynamic equilibrium, and the average CN-to-hydrogen-cyanide (HCN) abundance ratio of the four sources is about 0.036. We investigate, for the first time, the relationship between CN and HCN fractional abundances in all types of AGB stars, finding that the ratio is similar in O-rich and S-type stars, while those in C-rich stars are quite different. This result supports the idea that the level of HCN photodissociation plays a crucial role in determining the CN abundance in the circumstellar envelopes of AGB stars at various stages of their evolution. |
| DOI | 10.3847/1538-3881/ad8ba6 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MASS-LOSS RATES ; AGB STARS ; BEARING MOLECULES ; LINE EMISSION ; CIRCUMSTELLAR ; ENVELOPES ; CHEMISTRY ; EVOLUTION ; HCN ; PROFILES |
| Funding Project | Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Korea Astronomy and Space Science Institute ; National Key R&D Program of China[2017YFA0402700] ; Science and Technology Facilities Council of the United Kingdom ; JCMT[E21AZ002] ; National Science Foundation of China[12473025] ; National SKA Program of China[2022SKA0110203] ; National Key R&D Intergovernmental Cooperation Program of China[2023YFE0102300] ; Leverhulme Trust ; STFC[ST/T000198/1] ; STFC[2023] ; Leading Innovation and Entrepreneurship Team of Zhejiang Province of China[2023R01008] ; [2022D01B221] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001362682600001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Korea Astronomy and Space Science Institute ; National Key R&D Program of China ; Science and Technology Facilities Council of the United Kingdom ; JCMT ; National Science Foundation of China ; National SKA Program of China ; National Key R&D Intergovernmental Cooperation Program of China ; Leverhulme Trust ; STFC ; Leading Innovation and Entrepreneurship Team of Zhejiang Province of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7163 |
| Collection | 射电天文研究室_天体化学研究团组 射电天文研究室_理论天体物理研究团组 |
| Corresponding Author | Li, Xiaohu; Yang, Xiaofeng |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Xinjiang Key Lab Radio Astrophys, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 4.Queens Univ Belfast, Astrophys Res Ctr, Sch Math & Phys, Belfast BT7 1NN, North Ireland 5.Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Rabianska 8, PL-87100 Torun, Poland 6.Yunnan Univ, Dept Astron, Kunming 650091, Peoples R China 7.Res Ctr Astron Comp, Zhejiang Lab, Hangzhou 311121, Peoples R China 8.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS NTU 1,Sect 4,Roosevelt Rd, Taipei, Taiwan 9.Chinese Acad Sci, Key Lab Radio Astron & Technol, A20 Datun Rd, Beijing 100101, Peoples R China |
| 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 | Feng, Yanan,Li, Xiaohu,Yang, Xiaofeng,et al. Observations of Molecular CN toward S-type Asymptotic Giant Branch Stars[J]. ASTRONOMICAL JOURNAL,2024,168(6):285. |
| APA | Feng, Yanan.,Li, Xiaohu.,Yang, Xiaofeng.,Millar, Tom J..,Szczerba, Ryszard.,...&Liu, Xiang.(2024).Observations of Molecular CN toward S-type Asymptotic Giant Branch Stars.ASTRONOMICAL JOURNAL,168(6),285. |
| MLA | Feng, Yanan,et al."Observations of Molecular CN toward S-type Asymptotic Giant Branch Stars".ASTRONOMICAL JOURNAL 168.6(2024):285. |
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| Feng-2024-Observatio（652KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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