An Automatic Identification Method for the Photoelectron Boundary at Mars
文献类型：期刊论文
| 作者 | Wang,Yuqi1,4; Cao,Yutian3; Cui,Jun2,3; Wei,Yong1,4; Rong,Zhaojin1,4 |
| 刊名 | The Astronomical Journal
 |
| 出版日期 | 2022-03-23 |
| 卷号 | 163期号:4 |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/ac5825 |
| 英文摘要 | Abstract The photoelectron boundary (PEB) at Mars is defined to be the boundary separating the photoelectron-dominated ionosphere from the external plasma environment. Extensive studies have been presented to analyze the PEB variation in the Martian dayside ionosphere. However, the PEB was identified manually in previous studies because of the difficulty in detecting the faint photoelectron features at high altitudes. In this study, we develop an algorithm to detect these faint features and identify the location of PEB from energetic electron measurements automatically. We apply the algorithm to the measurements by the Solar Wind Electron Analyzer instrument on board the Mars Atmosphere and Volatile Evolution mission and identify a total number of 15,681 PEB crossing events accumulated from 2015 January to 2019 October, of which 9169 PEB are on the dayside and 6912 are on the nightside. Our analysis indicates that the altitude of the identified PEB tends to increase with solar extreme ultraviolet radiation and crustal magnetic field strength, in agreement with previous findings. By contrast, the PEB altitude on the nightside tends to increase dramatically with solar zenith angle but is found to be weakly influenced by the crustal magnetic field strength. |
| 语种 | 英语 |
| WOS记录号 | IOP:AJ_163_4_186 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102961]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Cao,Yutian |
| 作者单位 | 1.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, People's Republic of China 2.Center for Excellence in Comparative Planetology, Chinese Academy of Sciences, Hefei, Anhui, People's Republic of China 3.Planetary Environmental and Astrobiological Research Laboratory (PEARL), School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong, People's Republic of China; caoyt6@mail.sysu.edu.cn 4.School of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Wang,Yuqi,Cao,Yutian,Cui,Jun,et al. An Automatic Identification Method for the Photoelectron Boundary at Mars[J]. The Astronomical Journal,2022,163(4). |
| APA | Wang,Yuqi,Cao,Yutian,Cui,Jun,Wei,Yong,&Rong,Zhaojin.(2022).An Automatic Identification Method for the Photoelectron Boundary at Mars.The Astronomical Journal,163(4). |
| MLA | Wang,Yuqi,et al."An Automatic Identification Method for the Photoelectron Boundary at Mars".The Astronomical Journal 163.4(2022). |
入库方式： OAI收割
来源：地质与地球物理研究所
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