The Generation of Upward‐Propagating Whistler Mode Waves by Electron Beams in the Jovian Polar Regions

S. S. Elliott; D. A. Gurnett; P. H. Yoon; W. S. Kurth; B. H. Mauk; R. W. Ebert; G. Clark; P. Valek; F. Allegrini; S. J. Bolton; J. D. Menietti; P. Louarn; A. H. Sulaiman

doi:10.1029/2020JA027868

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The Generation of Upward‐Propagating Whistler Mode Waves by Electron Beams in the Jovian Polar Regions

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The Generation of Upward‐Propagating Whistler Mode Waves by Electron Beams in the Jovian Polar Regions

S. S. Elliott, D. A. Gurnett, P. H. Yoon, W. S. Kurth, B. H. Mauk, R. W. Ebert, G. Clark, P. Valek, F. Allegrini, S. J. Bolton, …

Journal of geophysical research. Space physics, Vol.125(6), e2020JA027868

06/2020

DOI: 10.1029/2020JA027868

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Abstract

Upward‐moving energetic electrons with energies of 1 MeV and above were observed over the entire Jovian polar region. The electrons were found to be associated with intense broadband whistler mode waves, similar to terrestrial whistler mode auroral hiss. Upward‐propagating whistler mode hiss at Earth is known to be generated by upward‐moving, magnetic field‐aligned electron beams (from electric field‐aligned potentials), by a beam‐plasma instability at the Landau resonance. Assuming this process at Jupiter, we present a linear stability analysis, showing the electron distribution functions (based on inverted‐V observations made by the Juno Jovian Auroral Distributions Experiment, JADE‐E, instrument) are unstable. The polarization of the modeled waves is consistent with whistler mode hiss (right‐hand circularly polarized). From the results of the linear stability analysis, we find that the calculated growth rates are sufficient to produce the observed whistler mode waves. Key Points Upgoing electron beams can generate upward‐propagating whistler mode waves over the Jovian polar cap region Numerical simulations show the electron beams are unstable and capable of producing the observed whistler mode waves Large growth rates are found for Landau (n = 0) resonance

auroral hiss

inverted‐Vs

Juno

Jupiter

magnetosphere

whistler mode waves

Details

Title: Subtitle: The Generation of Upward‐Propagating Whistler Mode Waves by Electron Beams in the Jovian Polar Regions
Creators: S. S. Elliott - University of Iowa
D. A. Gurnett - University of Iowa
P. H. Yoon - University of Maryland, College Park
W. S. Kurth - University of Iowa
B. H. Mauk - Johns Hopkins University Applied Physics Laboratory
R. W. Ebert - Southwest Research Institute
G. Clark - Johns Hopkins University Applied Physics Laboratory
P. Valek - Southwest Research Institute
F. Allegrini - Southwest Research Institute
S. J. Bolton - Southwest Research Institute
J. D. Menietti - University of Iowa
P. Louarn - Université Fédérale de Toulouse Midi-Pyrénées
A. H. Sulaiman - University of Iowa
Resource Type: Journal article
Publication Details: Journal of geophysical research. Space physics, Vol.125(6), e2020JA027868
DOI: 10.1029/2020JA027868
ISSN: 2169-9380
eISSN: 2169-9402
Number of pages: 11
Grant note: National Aeronautics and Space Administration (NASA) NASA (699041X) Southwest Research Institute (SWRI) (699041X)
Language: English
Date published: 06/2020
Academic Unit: Physics and Astronomy
Record Identifier: 9984455275502771

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