Solar control of CO_2~+ ultraviolet doublet emission on Mars
文献类型：期刊论文
| 作者 | Li Zichuan2; Cui Jun3; Li Jing3; Wu Xiaoshu2 ; Zhong Jiahao3; Jiang Fayu1
|
| 刊名 | Earth and Planetary Physics
 |
| 出版日期 | 2020 |
| 卷号 | 4期号:6页码:543 |
| 关键词 | Mars dayglow CO_2~+ MAVEN |
| ISSN号 | 2096-3955 |
| 英文摘要 | The CO_2~+ ultraviolet doublet (UVD) emission near 289 nm is an important feature of dayside airglow emission from planetary upper atmospheres.In this study, we analyzed the brightness profiles of CO_2~+ UVD emission on Mars by using the extensive observations made by the Imaging Ultraviolet Spectrograph on board the recent Mars Atmosphere and Volatile Evolution spacecraft.Strong solar cycle and solar zenith angle variations in peak emission intensity and altitude were revealed by the data: (1) Both the peak intensity and altitude increase with increasing solar activity, and (2) the peak intensity decreases, whereas the peak altitude increases, with increasing solar zenith angle.These observations can be favorably interpreted by the solar-driven scenario combined with the fact that photoionization and photoelectron impact ionization are the two most important processes responsible for the production of excitedstate CO_2~+ and consequently the intensity of CO_2~+ UVD emission.Despite this, we propose that an extra driver, presumably related to the complicated variation in the background atmosphere, such as the occurrence of global dust storms, is required to fully interpret the observations.In general, our analysis suggests that the CO_2~+ UVD emission is a useful diagnostic of the variability of the dayside Martian atmosphere under the influences of both internal and external drivers. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/56577]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.亚利桑那大学 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 | Li Zichuan,Cui Jun,Li Jing,et al. Solar control of CO_2~+ ultraviolet doublet emission on Mars[J]. Earth and Planetary Physics,2020,4(6):543. |
| APA | Li Zichuan,Cui Jun,Li Jing,Wu Xiaoshu,Zhong Jiahao,&Jiang Fayu.(2020).Solar control of CO_2~+ ultraviolet doublet emission on Mars.Earth and Planetary Physics,4(6),543. |
| MLA | Li Zichuan,et al."Solar control of CO_2~+ ultraviolet doublet emission on Mars".Earth and Planetary Physics 4.6(2020):543. |
入库方式： OAI收割
来源：国家天文台
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