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

<p>This is the supporting data set for the paper by the same title published in AGU JGR Space Physics,&nbsp;<a href="https://doi.org/10.1029/2021JA029885">10.1029/2021JA029885</a></p> <p><strong>Key Points:</strong></p> <ul> <li>Jovian whistler-mode chorus and Z-mode intensity distributions are surveyed and analyzed at the end of the Juno primary mission</li> <li>Bursty low frequency whistler mode emission implies electrons energies exceeding 100 keV</li> <li>Jovian whistler mode chorus and Z-mode intensity are parametrically fit to frequency, M-shell, and mag-latitude.</li> </ul> <p><strong>Abstract</strong></p> <p>At the end of the Juno primary mission we report observations of whistler mode chorus and Z-mode emission. &nbsp;The Juno orbits are evolving and much better coverage of the whistler mode chorus source region has resulted since the earlier surveys. &nbsp;Bursty chorus emission extending to ~30&deg; latitude and to frequencies less than the lower hybrid frequency near the source region imply high electron energies (&gt;100 keV). &nbsp;Average chorus intensity levels peak at ~10^-3 nT² near M-shell of 8-9 and magnetic latitude of &nbsp;~5&deg;. &nbsp;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. &nbsp;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. &nbsp;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. &nbsp;Both whistler mode and Z-mode waves may have significant impact on electron scattering and acceleration at Jupiter as recent models indicate.</p>