DOI: 10.1002/2015GL065169
论文题名: Model insights into energetic photoelectrons measured at Mars by MAVEN
作者: Sakai S. ; Rahmati A. ; Mitchell D.L. ; Cravens T.E. ; Bougher S.W. ; Mazelle C. ; Peterson W.K. ; Eparvier F.G. ; Fontenla J.M. ; Jakosky B.M.
刊名: Geophysical Research Letters
ISSN: 0094-8522
EISSN: 1944-8253
出版年: 2015
卷: 42, 期: 21 起始页码: 8894
结束页码: 8900
语种: 英语
英文关键词: Mars
; photoelectrons
; planetary ionospheres
; solar radiation
Scopus关键词: Augers
; Carbon
; Electron transport properties
; Ionization
; Ionosphere
; Ionospheric measurement
; Photoelectron spectroscopy
; Photoelectrons
; Photoionization
; Photons
; Solar radiation
; Thermionic emission
; Upper atmosphere
; Electron transport
; K-shell ionization
; Mars
; Martian ionosphere
; Photoelectron spectrum
; Planetary atmosphere
; Planetary ionospheres
; Suprathermal electrons
; Electrons
; airglow
; carbon
; electron density
; energy flux
; flux measurement
; heating
; instrumentation
; ionization
; ionosphere
; irradiance
; magnetosphere
; magnetotail
; Martian atmosphere
; nitrogen
; oxygen
; solar radiation
; solar wind
; spacecraft
; thermal power
英文摘要: Photoelectrons are important for heating, ionization, and airglow production in planetary atmospheres. Measured electron fluxes provide insight into the sources and sinks of energy in the Martian upper atmosphere. The Solar Wind Electron Analyzer instrument on board the MAVEN (Mars Atmosphere and Volatile EvolutioN) spacecraft measured photoelectrons including Auger electrons with 500 eV energies. A two-stream electron transport code was used to interpret the observations, including Auger electrons associated with K shell ionization of carbon, oxygen, and nitrogen. It explains the processes that control the photoelectron spectrum, such as the solar irradiance at different wavelengths, external electron fluxes from the Martian magnetosheath or tail, and the structure of the upper atmosphere (e.g., the thermal electron density). Our understanding of the complex processes related to the conversion of solar irradiances to thermal energy in the Martian ionosphere will be advanced by model comparisons with measurements of suprathermal electrons by MAVEN. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955183317&doi=10.1002%2f2015GL065169&partnerID=40&md5=e1e4f2debb104166a219998abe65a5b1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8138
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Physics and Astronomy, University of Kansas, Lawrence, KS, United States
Recommended Citation:
Sakai S.,Rahmati A.,Mitchell D.L.,et al. Model insights into energetic photoelectrons measured at Mars by MAVEN[J]. Geophysical Research Letters,2015-01-01,42(21).