Electron Temperatures in the Dayside Ionosphere of Mars Derived from Chemistry
文献类型：期刊论文
| 作者 | Vigren,E.4; Cui,J.1,2,3 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-12-18 |
| 卷号 | 887期号:2 |
| 关键词 | Mars Ionosphere Plasma physics |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab53db |
| 英文摘要 | Abstract From a reduced chemical model of the Martian dayside ionosphere we derive an expression that can be used to estimate the electron temperature as a function of the ambient number densities of CO2, O, , , O+, and NO+ and the total ion number density. The model is tested in the sunlit ionosphere with Mars Atmosphere and Volatile EvolutioN/Neutral Gas Ion Mass Spectrometer (MAVEN/NGIMS) data from the Deep Dip campaigns DD2 (2015 April) and DD8 (2017 October). Around an altitude of ～130–140 km the calculated electron temperatures along the DD2 orbits are in many cases compatible with the neutral temperatures derived from the CO2 density profiles and downward integration of the hydrostatic balance equation, indicating efficient cooling of the electron population. For altitudes below 170 km the electron temperature (constructed from median density profiles) are higher for DD8 than for DD2 which we link to atmospheric solar cycle modulation. Median electron temperatures derived for DD2 and DD8 are roughly similar when inspecting similar CO2 number densities and a simple power law is proposed to relate the electron temperature to the CO2 number density. Calculated electron temperatures of approximately 1000?K around an altitude of 180–200 km appear not to conflict with published data from MAVEN Langmuir Probe Wave (LPW) measurements. At greater depths the LPW-derived electron temperatures have been reported as biased high and so a detailed comparison with results from the present work is merely proposed as a dedicated follow-up study. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-887-2-AB53DB |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28685]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.CAS Center for Excellence in Comparative Planetology, Hefei, People's Republic of China 2.CAS Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, People's Republic of China 3.School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, People's Republic of China 4.Swedish Institute of Space Physics, Uppsala, Sweden; erik.vigren@irfu.se |
| 推荐引用方式 GB/T 7714 | Vigren,E.,Cui,J.. Electron Temperatures in the Dayside Ionosphere of Mars Derived from Chemistry[J]. The Astrophysical Journal,2019,887(2). |
| APA | Vigren,E.,&Cui,J..(2019).Electron Temperatures in the Dayside Ionosphere of Mars Derived from Chemistry.The Astrophysical Journal,887(2). |
| MLA | Vigren,E.,et al."Electron Temperatures in the Dayside Ionosphere of Mars Derived from Chemistry".The Astrophysical Journal 887.2(2019). |
入库方式： OAI收割
来源：国家天文台
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