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

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

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.

Original languageEnglish (US)
Article numbere2020JA027868
JournalJournal of Geophysical Research: Space Physics
Volume125
Issue number6
DOIs
StatePublished - Jun 1 2020
Externally publishedYes

Bibliographical note

Funding Information:
The research at the University of Iowa was supported by NASA through Contract 699041X with the Southwest Research Institute (SwRI). The work at SwRI was funded by the NASA New Frontiers Program for Juno. The JADE data presented here?The JNO-J/SW-JAD-3-CALIBRATED-V2.0 (Version 02 files) and JNO-J/SW-JAD-2-UNCALIBRATED-V1.0 (Version 01 files)?resides at NASA's Planetary Data System (https://pds.nasa.gov/). P. H. Y. acknowledges support from GFT Charity, Inc., to the University of Maryland, College Park, BK21 Plus program from NRF, South Korea, to Kyung Hee University, South Korea, and KASI basic research funds. We thank Andrew J. Kopf for his helpful feedback and suggestions, and we also thank Jeremy Faden and Chris Piker for their aid in data acquisition and plotting.

Funding Information:
The research at the University of Iowa was supported by NASA through Contract 699041X with the Southwest Research Institute (SwRI). The work at SwRI was funded by the NASA New Frontiers Program for Juno. The JADE data presented here—The JNO‐J/SW‐JAD‐3‐CALIBRATED‐V2.0 (Version 02 files) and JNO‐J/SW‐JAD‐2‐UNCALIBRATED‐V1.0 (Version 01 files)—resides at NASA's Planetary Data System ( https://pds.nasa.gov/ ). P. H. Y. acknowledges support from GFT Charity, Inc., to the University of Maryland, College Park, BK21 Plus program from NRF, South Korea, to Kyung Hee University, South Korea, and KASI basic research funds. We thank Andrew J. Kopf for his helpful feedback and suggestions, and we also thank Jeremy Faden and Chris Piker for their aid in data acquisition and plotting.

Publisher Copyright:
©2020. American Geophysical Union. All Rights Reserved.

Keywords

  • Juno
  • Jupiter
  • auroral hiss
  • inverted-Vs
  • magnetosphere
  • whistler mode waves

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