A 3 mm molecular line survey toward the C-star envelope CIT 6
文献类型：期刊论文
| 作者 | Yang, Kuilu5; Zhang, Yong3,4,5 ; Qiu, Jianjie2,3,5; Ao, Yina5; Li, Xiaohu1,4
|
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2023-07-18 |
| 页码 | 21 |
| ISSN号 | 0004-6264 |
| 关键词 | circumstellar matter ISM: molecules radio lines: stars stars: AGB and post-AGB |
| DOI | 10.1093/pasj/psad043 |
| 通讯作者 | Zhang, Yong(zhangyong5@mail.sysu.edu.cn) |
| 英文摘要 | 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. |
| WOS关键词 | MASS-LOSS RATES ; RICH CIRCUMSTELLAR ENVELOPES ; EVOLVED STARS ; CARBON-MONOXIDE ; RED GIANTS ; PROTOPLANETARY DISK ; PLANETARY-NEBULAE ; COLOGNE DATABASE ; O-RICH ; EMISSION |
| 资助项目 | 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研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:001033392000001 |
| 资助机构 | 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 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5322]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Zhang, Yong |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Peoples R China 3.Sun Yat Sen Univ, CSST Sci Ctr Guangdong Hongkong Macau Greater Bay, Zhuhai 519000, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 5.Sun Yat Sen Univ, Sch Phys & Astron, 2 Da Xue Rd, Zhuhai 519000, Guangdong, Peoples R China |
| 推荐引用方式 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,2023:21. |
| 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,21. |
| 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 (2023):21. |
入库方式： OAI收割
来源：新疆天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。