Analysis of Whistler-Mode and Z-Mode Emission in the Juno Primary Mission

0549714 - ÚFA 2022 RIV US eng J - Journal Article
Menietti, J. D. - Averkamp, T. F. - Kurth, W. S. - Imai, M. - Faden, J. B. - Hospodarsky, G. B. - Santolík, Ondřej - Clark, G. - Allegrini, F. - Elliott, S.S. - Sulaiman, A. H. - Bolton, S.J.
Analysis of Whistler-Mode and Z-Mode Emission in the Juno Primary Mission.
Journal of Geophysical Research-Space Physics. Roč. 126, č. 11 (2021), č. článku e2021JA029885. ISSN 2169-9380. E-ISSN 2169-9402
Institutional support: RVO:68378289
Keywords : magnetospheric physics * Juno * Jupiter * whistler mode emissions
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 3.111, year: 2021
Method of publishing: Limited access
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JA029885

At the end of the Juno primary mission, we report observations of whistler mode chorus and Z-mode emission. The Juno orbits are evolving and much better coverage of the whistler mode chorus source region has resulted since the earlier surveys. Bursty chorus emission extending to similar to 30 degrees latitude and to frequencies less than the lower hybrid frequency near the source region imply high electron energies (>100 keV). Average chorus intensity levels peak at similar to 10(-3) nT(2) near M-shell of 8-9 and magnetic latitude of similar to 5 degrees. Z-mode emission is identified at higher latitudes generally near and inward of the Io torus with intensity levels as much as two orders of magnitude higher than Z-mode emissions observed at Saturn. Inferred source regions for the Z-mode are consistent with the inner edge of the Io torus and with auroral field lines that may also support Jovian kilometric and decametric emission. Parametric fitting functions are evaluated for both whistler mode chorus and Z-mode, describing wave intensity as a function of frequency, magnetic latitude, and M-shell. Both whistler mode and Z-mode waves may have significant impact on electron scattering and acceleration at Jupiter as recent models indicate.
Permanent Link: http://hdl.handle.net/11104/0325651