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| A 3 mm molecular line survey toward the C-star envelope CIT 6 | |
Yang, Kuilu1; Zhang, Yong1,2,3; Qiu, Jianjie1,3,4; Ao, Yina1; Li, Xiaohu2,5
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| 2023-07-18 | |
| Source Publication | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| ISSN | 0004-6264 |
| Volume | 75Issue:5Pages:853-873 |
| Contribution Rank | 2 |
| Abstract | We present an unbiased molecular line survey toward the carbon-rich circumstellar envelope CIT 6 carried out between 90 and 116 GHz with the Arizona Radio Observatory 12 m telescope. A total of 42 lines assigned to 10 molecular species and four isotopologues are detected. Despite the absence of any newly identified circumstellar molecules, several transitions are freshly reported for this object. This work is a complement to our previous line survey toward CIT 6 in the frequency ranges of 36-49 GHz and 131-268 GHz. Based on the measurements and in combination with previously published data, we perform a rotation-diagram analysis to determine the column densities, excitation temperatures, and fractional abundances of the molecules. The excitation temperature varies along the radius. The abundance pattern of CIT 6 is broadly consistent with that of the prototype C-star IRC +10216 at the specified detection sensitivity, indicating that the molecular richness in IRC +10216 cannot be attributed to an interpretation of unusual chemistry. Nevertheless, subtle distinctions between the two C-stars are found. The higher abundance of carbon-chain molecules and lower C-12/C-13 ratio in CIT 6 compared to IRC +10216 imply that the former is more massive or in a more evolved phase than the latter. |
| Keyword | circumstellar matter ISM: molecules radio lines: stars stars: AGB and post-AGB |
| DOI | 10.1093/pasj/psad043 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | MASS-LOSS RATES ; RICH CIRCUMSTELLAR ENVELOPES ; EVOLVED STARS ; CARBON-MONOXIDE ; RED GIANTS ; PROTOPLANETARY DISK ; PLANETARY-NEBULAE ; COLOGNE DATABASE ; O-RICH ; EMISSION |
| Funding Project | National Science Foundation of China(NSFC)[11973099] ; National Science Foundation of China(NSFC)[12003080] ; China Manned Space Project[CMS-CSST-2021-A09] ; China Manned Space Project[CMS-CSST-2021-A10] ; Guang-dong Basic and Applied Basic Research Foundation[2019A1515110588] ; Fundamental Research Funds for the Central Universities[22qntd3101] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001033392000001 |
| Publisher | OXFORD UNIV PRESS |
| Funding Organization | National Science Foundation of China(NSFC) ; China Manned Space Project ; Guang-dong Basic and Applied Basic Research Foundation ; Fundamental Research Funds for the Central Universities |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5323 |
| Collection | 射电天文研究室_天体化学研究团组 |
| Corresponding Author | Zhang, Yong |
| Affiliation | 1.Sun Yat Sen Univ, Sch Phys & Astron, 2 Da Xue Rd, Zhuhai 519000, Guangdong, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.Sun Yat Sen Univ, CSST Sci Ctr Guangdong Hongkong Macau Greater Bay, Zhuhai 519000, Peoples R China 4.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Peoples R China 5.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Yang, Kuilu,Zhang, Yong,Qiu, Jianjie,et al. A 3 mm molecular line survey toward the C-star envelope CIT 6[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2023,75(5):853-873. |
| APA | Yang, Kuilu,Zhang, Yong,Qiu, Jianjie,Ao, Yina,&Li, Xiaohu.(2023).A 3 mm molecular line survey toward the C-star envelope CIT 6.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,75(5),853-873. |
| MLA | Yang, Kuilu,et al."A 3 mm molecular line survey toward the C-star envelope CIT 6".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 75.5(2023):853-873. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Yang-2023-A 3 mm mol（4373KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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