Quasilinear Wave‐Particle Analysis in the Source Region of Jovian Kilometric Radio Emission

Jovian broadband kilometric emission (bKOM) is observed by the Juno spacecraft within a source region in the northern hemisphere near the equatorward edge of the auroral oval. A well‐developed upward loss cone is the free‐energy source of the bKOM. The spacecraft also detected intense low‐energy (few hundred eV) counter‐streaming electrons which are known to generate whistler mode emission via Landau resonance. In addition, hot protons (tens of keV thermal energy) accompanied by Alfvénic low‐frequency emissions are also frequently detected in these source regions. We use quasilinear analysis to examine the generation and growth of bKOM and the dynamics of wave‐particle interaction of the electron beams with bKOM and the growth of whistler mode and Z‐mode emission. We also carry out quasilinear analysis of protons interacting with the low‐frequency modes that coexist in the bKOM source region. The comprehensive quasilinear wave‐particle analysis involving the energetic loss‐cone electrons and high‐frequency bKOM emission, counter‐streaming electron beams and low‐frequency/low‐intensity electrostatic modes, and hot protons and Alfvén/proton‐cyclotron wave emission, are shown to be successful in explaining/replicating the observed wave emission characteristics and various charged‐particle properties.