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    Model insights into energetic photoelectrons measured at Mars by MAVEN

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    CravensThomas_2015.pdf (436.2Kb)
    Issue Date
    2016-02-03
    Author
    Sakai, Shotaro
    Rahmati, Ali
    Mitchell, David L.
    Cravens, Thomas Edward
    Bougher, Stephen W.
    Mazelle, Christian
    Peterson, W. K.
    Eparvier, Francis
    Fontenla, Juan M.
    Jakosky, Bruce M.
    Publisher
    American Geophysical Union
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    ©2015. American Geophysical Union. All Rights Reserved.
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    Abstract
    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.
    URI
    http://hdl.handle.net/1808/22114
    DOI
    https://doi.org/10.1002/2015GL065169
    Collections
    • Physics and Astronomy Scholarly Works [1636]
    Citation
    Sakai, S., Rahmati, A., Mitchell, D. L., Cravens, T. E., Bougher, S. W., Mazelle, C., … Jakosky, B. M. (2015). Model insights into energetic photoelectrons measured at Mars by MAVEN. Geophysical Research Letters, 42(21), 8894–8900. doi:10.1002/2015gl065169

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    KU Libraries
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    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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