Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature. II. Carbon Monosulfide
文献类型：期刊论文
| 作者 | Qiu, Jian-Jie1,2,3; Zhang, Yong4,5,6,7; Lu, Deng-Rong8; Chang, Zheng-xue9; Zhang, Jiang-Shui10; Li, Xiao-Hu5; Tang, Xin-Di5; Qiu, Yisheng11; Nakashima, Jun-ichi4,6; Jia, Lan-Wei10 |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 170期号:4页码:230 |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/adfdda |
| 产权排序 | 5 |
| 英文摘要 | The carrier of the 21 mu m emission feature discovered in a handful of protoplanetary nebulae (PPNe) is one of the most intriguing enigmas in circumstellar chemistry. Investigating the gas-phase molecules in PPNe could yield important hints for understanding the 21 mu m feature. In this paper, we report observations of the carbon monosulfide (CS) J = 5 -> 4 line at 245 GHz and the CO J = 1 -> 0 line at 115 GHz toward seven PPNe exhibiting the 21 mu m feature. We find that CS is extremely scarce in these PPNe and the CS line is only detected in one source, IRAS Z02229+6208. Based on the assumption of local thermal equilibrium and negligible optical depth, we derive that the CS column densities and fractional abundances relative to H-2 are N(CS) < 9.1 x 10(13) cm(-2) and f(CS) < 8.1 x 10(-7). A comparison of the CS abundances across different circumstellar envelopes reveals that the variations in CS abundance are complex, depending not only on the evolutionary stages but also on the properties of individual objects. |
| WOS关键词 | MASS-LOSS RATES ; PLANETARY-NEBULAE ; LINE SURVEY ; EVOLVED STARS ; CIRCUMSTELLAR ENVELOPES ; DUST SHELL ; COLOGNE DATABASE ; AGB STARS ; CRL 2688 ; RICH |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001575448900001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8160]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Zhang, Yong |
| 作者单位 | 1.Jinggangshan Univ, Sch Math & Phys, 28 Xueyuan Rd, Jian 343009, Jiangxi, Peoples R China 2.Jiangxi Educ Inst, Key Lab Energy Convers Optoelect Funct Mat, Jian 343009, Peoples R China 3.JingGangShan Univ, Inst Astron & Astrophys, Dept Phys, Jian 343009, Peoples R China 4.Sun Yat Sen Univ, Sch Phys & Astron, 2 Da Xue Rd, Zhuhai 519000, Guangdong, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 6.Sun Yat Sen Univ, CSST Sci Ctr, Guangdong Hongkong Macau Greater Bay Area, Zhuhai, Peoples R China 7.Univ Hong Kong, Lab Space Res, Hong Kong, Peoples R China 8.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Jiangsu, Peoples R China 9.Handan Univ, Coll Math & Phys, Handan 056005, Hebei, Peoples R China 10.Guangzhou Univ, Ctr Astrophys, Guangzhou Higher Educ Mega Ctr, 230 Wai Huan Xi Rd, Guangzhou 510006, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Jian-Jie,Zhang, Yong,Lu, Deng-Rong,et al. Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature. II. Carbon Monosulfide[J]. ASTRONOMICAL JOURNAL,2025,170(4):230. |
| APA | Qiu, Jian-Jie.,Zhang, Yong.,Lu, Deng-Rong.,Chang, Zheng-xue.,Zhang, Jiang-Shui.,...&Jia, Lan-Wei.(2025).Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature. II. Carbon Monosulfide.ASTRONOMICAL JOURNAL,170(4),230. |
| MLA | Qiu, Jian-Jie,et al."Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature. II. Carbon Monosulfide".ASTRONOMICAL JOURNAL 170.4(2025):230. |
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