A Radio Molecular Line Search for Evidence of an O-rich Environment Around Binary in Silicate Carbon Stars
文献类型：期刊论文
| 作者 | Zhao, Zhang1; Chen, Xi1,2; Ellingsen, Simon P.3; Sobolev, Andrej M.4; Ouyang, Xujia1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2020-02-10 |
| 卷号 | 890期号:1页码:11 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab6594 |
| 英文摘要 | We report observations of oxygen-rich (O-rich) radio molecular line tracers, including H2CO, H2O, and HCO+ toward 28 silicate carbon stars (SCSs). SCSs are special evolved star systems that consist of a carbon star associated with peculiar O-rich circumstellar material. Absorption in the 6 cm H2CO transition was detected from seven SCSs using the Shanghai 65 m Tianma radio telescope. In order to further investigate their O-rich material, several 3 mm molecular lines including HCO+ and CO were also observed with the Purple Mountain Observatory 13.7 m telescope. Double-peak profiles in some of these lines suggest the possible presence of a companion in the SCS system. A negative association between H2O masers and H2CO absorption was found in our sample of SCSs. The H2O maser sources may correspond to an earlier evolutionary stage when the circumstellar envelope (CSE) material is O-rich and limited to a compact and denser region. As the star evolves the CSE gradually expands and carbon abundance is enhanced, resulting in the H2O masers disappearing and H2CO absorption arising. |
| WOS关键词 | WATER MASER EMISSION ; NEAR-IR PHOTOMETRY ; V778 CYGNI ; DUST ; DISK ; IDENTIFICATION ; ENVELOPES ; NUCLEOSYNTHESIS ; CHEMISTRY ; CATALOG |
| 资助项目 | Foundation of China[11590781] ; Foundation of China[11873002] ; Foundation of China[11590780] ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Ministry of Science and High Education[AAAA-A17-117030310283-7] ; Act 211 Government of the Russian Federation[02.A03.21.0006] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000522095800034 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | Foundation of China ; Foundation of China ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Ministry of Science and High Education ; Ministry of Science and High Education ; Act 211 Government of the Russian Federation ; Act 211 Government of the Russian Federation ; Foundation of China ; Foundation of China ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Ministry of Science and High Education ; Ministry of Science and High Education ; Act 211 Government of the Russian Federation ; Act 211 Government of the Russian Federation ; Foundation of China ; Foundation of China ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Ministry of Science and High Education ; Ministry of Science and High Education ; Act 211 Government of the Russian Federation ; Act 211 Government of the Russian Federation ; Foundation of China ; Foundation of China ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2019) ; Ministry of Science and High Education ; Ministry of Science and High Education ; Act 211 Government of the Russian Federation ; Act 211 Government of the Russian Federation |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55520]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Chen, Xi |
| 作者单位 | 1.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Shanghai, Peoples R China 3.Univ Tasmania, Sch Nat Sci, Private Bag 37, Hobart, Tas 7001, Australia 4.Ural Fed Univ, 19 Mira St, Ekaterinburg 620002, Russia |
| 推荐引用方式 GB/T 7714 | Zhao, Zhang,Chen, Xi,Ellingsen, Simon P.,et al. A Radio Molecular Line Search for Evidence of an O-rich Environment Around Binary in Silicate Carbon Stars[J]. ASTROPHYSICAL JOURNAL,2020,890(1):11. |
| APA | Zhao, Zhang,Chen, Xi,Ellingsen, Simon P.,Sobolev, Andrej M.,&Ouyang, Xujia.(2020).A Radio Molecular Line Search for Evidence of an O-rich Environment Around Binary in Silicate Carbon Stars.ASTROPHYSICAL JOURNAL,890(1),11. |
| MLA | Zhao, Zhang,et al."A Radio Molecular Line Search for Evidence of an O-rich Environment Around Binary in Silicate Carbon Stars".ASTROPHYSICAL JOURNAL 890.1(2020):11. |
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来源：国家天文台
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