Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature
文献类型：期刊论文
| 作者 | Qiu, Jian-Jie7,8,9; Zhnag, Yong6,7,9; Nakashima, Jun-ichi7,9; Zhang, Jiang-Shui5; Li, Fei1,8; Lu, Deng-Rong4; Tang, Xin-Di6 ; Yu, Xiao-Ling3; Jia, Lan-Wei2
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2024-03-01 |
| 卷号 | 167期号:3页码:91 |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/ad198f |
| 产权排序 | 4 |
| 英文摘要 | It has been more than 30 years since the enigmatic 21 mu m emission feature was first discovered in protoplanetary nebulae (PPNs). Although dozens of different dust carrier candidates have been proposed, there is as yet no widely accepted one. We present the results of molecular observations toward 21 mu m objects using the 10 m Submillimeter Telescope of Arizona Radio Observatory in the 1.3 mm band and the 13.7 m telescope of Purple Mountain Observatory in the 3 mm band, aiming to investigate whether the gas-phase environments of these unusual sources have some peculiarities compared to normal PPNs. We detect 31 emission lines belonging to seven different molecular species, most of which are the first detection in 21 mu m PPNs. The observations provide clues to the identification of the 21 mu m feature. We report a correlation study between the fractional abundance of gas-phase molecules and the strengths of the 21 mu m emission. Our study shows that, given the small sample size, the 21 mu m feature has weak or no correlations with the gas-phase molecules. Future radio observations of high spatial and spectral resolution toward a large sample are desirable to elucidate the 21 mu m emission phenomena. |
| WOS关键词 | COLD IRAS OBJECTS ; EVOLVED STARS ; LINE SURVEY ; PREPLANETARY NEBULAE ; UNIDENTIFIED FEATURE ; IMAGING POLARIMETRY ; ABUNDANCE ANALYSIS ; COLOGNE DATABASE ; DUST SHELL ; MASS-LOSS |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11973099] ; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12333005] ; National Natural Science Foundation of China (NSFC)[12103024] ; NSFC[2019A1515110588] ; Guangdong Basic and Applied Basic Research Foundation[22qntd3101] ; Fundamental Research Funds for the Central Universities (Sun Yat-sen University) ; Xinjiang Uygur Autonomous Region of China[CMS-CSST-2021-A09] ; Xinjiang Uygur Autonomous Region of China[CMS-CSST-2021-A10] ; China Manned Space Project[2021M691531] ; China Postdoctoral Science Foundation[xbzg-zdsys-202212] ; Chinese Academy of Sciences (CAS) Light of West China Program[2022D01E06] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022TSYCLJ0005] ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001158106300001 |
| 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 ; National Natural Science Foundation of China (NSFC) ; NSFC ; Guangdong Basic and Applied Basic Research Foundation ; Fundamental Research Funds for the Central Universities (Sun Yat-sen University) ; Xinjiang Uygur Autonomous Region of China ; China Manned Space Project ; China Postdoctoral Science Foundation ; Chinese Academy of Sciences (CAS) Light of West China Program ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Tianshan Talent Program of Xinjiang Uygur Autonomous Region |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5803]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Zhnag, Yong |
| 作者单位 | 1.Nanjing Univ, Sch Astron & Space Sci, 163 Xianlin Ave, Nanjing 210023, Jiangsu Provinc, Peoples R China 2.Guangzhou Univ, Guangzhou Higher Educ Mega Ctr, Sch Phys & Mat Sci, 230 Wai Huan Xi Rd, Guangzhou 510006, Guangdong, Peoples R China 3.Qujing Normal Univ, Coll Phys & Elect Engn, Qujing 655011, Yunnan Province, Peoples R China 4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Jiangsu Provinc, Peoples R China 5.Guangzhou Univ, Ctr Astrophys, Guangzhou Higher Educ Mega Ctr, 230 Wai Huan Xi Rd, Guangzhou 510006, Guangdong Provi, Peoples R China 6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang Provin, Peoples R China 7.Sun Yat Sen Univ, CSST Sci Ctr Guangdong Hongkong Macau Greater Bay, Zhuhai, Peoples R China 8.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu Provinc, Peoples R China 9.Sun Yat Sen Univ, Sch Phys & Astron, 2 Da Xue Rd, Zhuhai 519000, Guangdong Provi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Jian-Jie,Zhnag, Yong,Nakashima, Jun-ichi,et al. Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature[J]. ASTRONOMICAL JOURNAL,2024,167(3):91. |
| APA | Qiu, Jian-Jie.,Zhnag, Yong.,Nakashima, Jun-ichi.,Zhang, Jiang-Shui.,Li, Fei.,...&Jia, Lan-Wei.(2024).Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature.ASTRONOMICAL JOURNAL,167(3),91. |
| MLA | Qiu, Jian-Jie,et al."Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature".ASTRONOMICAL JOURNAL 167.3(2024):91. |
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