Interactions between energetic electrons and realistic whistler mode waves in the Jovian magnetosphere

M. de Soria-Santacruz; Y. Y. Shprits; A. Drozdov; J. D. Menietti; H. B. Garrett; H. Zhu; A. C. Kellerman; R. B. Horne

doi:10.1002/2017JA023975

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Interactions between energetic electrons and realistic whistler mode waves in the Jovian magnetosphere

Journal article

Peer reviewed

Interactions between energetic electrons and realistic whistler mode waves in the Jovian magnetosphere

M. de Soria-Santacruz, Y. Y. Shprits, A. Drozdov, J. D. Menietti, H. B. Garrett, H. Zhu, A. C. Kellerman and R. B. Horne

Journal of geophysical research. Space physics, Vol.122(5), pp.5355-5364

05/01/2017

DOI: 10.1002/2017JA023975

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Abstract

The role of plasma waves in shaping the intense Jovian radiation belts is not well understood. In this study we use a realistic wave model based on an extensive survey from the Plasma Wave Investigation on the Galileo spacecraft to calculate the effect of pitch angle and energy diffusion on Jovian energetic electrons due to upper and lower band chorus. Two Earth-based models, the Full Diffusion Code and the Versatile Electron Radiation Belt code, are adapted to the case of the Jovian magnetosphere and used to resolve the interaction between chorus and electrons at L = 10. We also present a study of the sensitivity to the latitudinal wave coverage and initial electron distribution. Our analysis shows that the contribution to the electron dynamics from upper band chorus is almost negligible compared to that from lower band chorus. For 100keV electrons, we observe that diffusion leads to redistribution of particles toward lower pitch angles with some particle loss, which could indicate that radial diffusion or interchange instabilities are important. For energies above >500keV, an initial electron distribution based on observations is only weakly affected by chorus waves. Ideally, we would require the initial electron phase space density before transport takes place to assess the importance of wave acceleration, but this is not available. It is clear from this study that the shape of the electron phase space density and the latitudinal extent of the waves are important for both electron acceleration and loss.

Astronomy & Astrophysics

Physical Sciences

Science & Technology

Details

Title: Subtitle: Interactions between energetic electrons and realistic whistler mode waves in the Jovian magnetosphere
Creators: M. de Soria-Santacruz - California Institute of Technology
Y. Y. Shprits - Planetary Science Institute
A. Drozdov - Planetary Science Institute
J. D. Menietti - University of Iowa
H. B. Garrett - Jet Propulsion Laboratory
H. Zhu - Planetary Science Institute
A. C. Kellerman - University of California, Los Angeles
R. B. Horne - British Antarctic Survey
Resource Type: Journal article
Publication Details: Journal of geophysical research. Space physics, Vol.122(5), pp.5355-5364
DOI: 10.1002/2017JA023975
ISSN: 2169-9380
eISSN: 2169-9402
Publisher: Amer Geophysical Union
Number of pages: 10
Grant note: bas0100031 / Natural Environment Research Council; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) ST/M00130X/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) bas0100031 / NERC; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) ST/M00130X/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
Language: English
Date published: 05/01/2017
Academic Unit: Physics and Astronomy
Record Identifier: 9984627302102771

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