FAST Detection of OH Emission in the Carbon-rich Planetary Nebula NGC 7027
文献类型：期刊论文
| 作者 | Ouyang,Xu-Jia10; Zhang,Yong8,9,10; Zhang,Chuan-Peng6,7; Jiang,Peng6,7; Nakashima,Jun-ichi8,10; Chen,Xi4,5; Qiao,Hai-Hua2,3; Zhang,Xu-Ying10; Sun,Hao-Min10; Li,Xiao-Hu9 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2024-08-28 |
| 卷号 | 972期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad6c35 |
| 英文摘要 | Abstract We present the first detection of the ground-state OH emission line at 1612 MHz toward the prototypical carbon-rich planetary nebula (PN) NGC 7027, utilizing the newly installed ultrawideband (UWB) receiver of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). This emission is likely to originate from the interface of the neutral shell and the ionized region. The other three ground-state OH lines at 1665, 1667, and 1721 MHz are observed in absorption and have velocities well matched with that of HCO+ absorption. We infer that the OH absorption is from the outer shell of NGC 7027, although the possibility that they are associated with a foreground cloud cannot be completely ruled out. All the OH lines exhibit a single blueshifted component with respect to the central star. The formation of OH in carbon-rich environments might be via photodissociation-induced chemical processes. Our observations offer significant constraints for chemical simulations, and they underscore the potent capability of the UWB receiver of FAST to search for nascent PNe. |
| 语种 | 英语 |
| WOS记录号 | IOP:APJ_972_1_96 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://210.72.145.45/handle/361003/14484]  |
| 专题 | 国家授时中心_守时理论与方法研究室 |
| 作者单位 | 1.Department of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK 2.Key Laboratory of Time Reference and Applications, Chinese Academy of Sciences, People's Republic China 3.National Time Service Center, Chinese Academy of Sciences, Xi’An, Shaanxi 710600, People's Republic of China 4.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic China 5.Center for Astrophysics, Guangzhou University, Guangzhou 510006, People's Republic China 6.Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang 550000, People's Republic China 7.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic China 8.CSST Science Center for the Guangdong-Hongkong-Macau Greater Bay Area, Sun Yat-sen University, Guangdong Province, People's Republic China 9.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi, Xinjiang 830011, People's Republic of China 10.School of Physics and Astronomy, Sun Yat-sen University, 2 Daxue Road, Tangjia, Zhuhai, Guangdong Province, People's Republic China; zhangyong5@mail.sysu.edu.cn |
| 推荐引用方式 GB/T 7714 | Ouyang,Xu-Jia,Zhang,Yong,Zhang,Chuan-Peng,et al. FAST Detection of OH Emission in the Carbon-rich Planetary Nebula NGC 7027[J]. The Astrophysical Journal,2024,972(1). |
| APA | Ouyang,Xu-Jia.,Zhang,Yong.,Zhang,Chuan-Peng.,Jiang,Peng.,Nakashima,Jun-ichi.,...&Zijlstra,Albert.(2024).FAST Detection of OH Emission in the Carbon-rich Planetary Nebula NGC 7027.The Astrophysical Journal,972(1). |
| MLA | Ouyang,Xu-Jia,et al."FAST Detection of OH Emission in the Carbon-rich Planetary Nebula NGC 7027".The Astrophysical Journal 972.1(2024). |
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