photoelectronbalanceinthedaysidemartianupperatmosphere
文献类型：期刊论文
| 作者 | Wu Xiaoshu2 ; Cui Jun3; Yu Jiang1; Liu Lijuan3; Zhou Zhenjun3
|
| 刊名 | earthandplanetaryphysics
 |
| 出版日期 | 2019 |
| 卷号 | 3期号:5页码:373 |
| ISSN号 | 2096-3955 |
| 英文摘要 | Photoelectrons are produced by solar Extreme Ultraviolet radiation and contribute significantly to the local ionization and heat balances in planetary upper atmospheres. When the effect of transport is negligible, the photoelectron energy distribution is controlled by a balance between local production and loss, a condition usually referred to as local energy degradation. In this study, we examine such a condition for photoelectrons near Mars, with the aid of a multi-instrument Mars Atmosphere and Volatile Evolution data set gathered over the inbound portions of a representative dayside MAVEN orbit. Various photoelectron production and loss processes considered here include primary and secondary ionization, inelastic collisions with atmospheric neutrals associated with both excitation and ionization, as well as Coulomb collisions with ionospheric thermal electrons. Our calculations indicate that photoelectron production occurs mainly via primary ionization and degradation from higher energy states during inelastic collisions; photoelectron loss appears to occur almost exclusively via degradation towards lower energy states via inelastic collisions above 10 eV, but the effect of Coulomb collisions becomes important at lower energies. Over the energy range of 30–55 eV (chosen to reduce the influence of the uncertainty in spacecraft charging), we find that the condition of local energy degradation is very well satisfied for dayside photoelectrons from 160 to 250 km. No evidence of photoelectron transport is present over this energy range. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28280]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.澳门科技大学 2.中国科学院国家天文台 3.中山大学 |
| 推荐引用方式 GB/T 7714 | Wu Xiaoshu,Cui Jun,Yu Jiang,et al. photoelectronbalanceinthedaysidemartianupperatmosphere[J]. earthandplanetaryphysics,2019,3(5):373. |
| APA | Wu Xiaoshu,Cui Jun,Yu Jiang,Liu Lijuan,&Zhou Zhenjun.(2019).photoelectronbalanceinthedaysidemartianupperatmosphere.earthandplanetaryphysics,3(5),373. |
| MLA | Wu Xiaoshu,et al."photoelectronbalanceinthedaysidemartianupperatmosphere".earthandplanetaryphysics 3.5(2019):373. |
入库方式： OAI收割
来源：国家天文台
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