Statistical distribution of chorus waves in the Jovian magnetosphere and their resonant interactions with radiation belt electrons

Whistler-mode chorus waves are frequently observed in the Jovian magnetosphere and are known to play an important role in the dynamics of radiation belt electrons. By combining the observations from Galileo and Juno, we conducted a detailed statistical analysis of the spatial distribution of the occurrence rates, power spectral densities and averaged amplitudes of chorus waves in the Jovian magnetosphere. The statistical results show that chorus waves are mainly distributed in the near-equatorial (<20°) region at 5< M-shell <12. The averaged wave amplitudes range from several pT to tens of pT and are significantly enhanced in the vicinity of Europa and Ganymede. The wave amplitudes peak at M-shell = 8-11 within λ≤10° with a strong dawn-dusk asymmetry. In addition, the wave power spectral intensities decrease monotonically with increasing f/f_ce, where f and f_ce are the wave frequency and electron gyrofrequency, respectively. We subsequently construct an empirical model of the distribution of chorus wave amplitudes with M-shell, magnetic latitude and magnetic local time. Based on the developed wave model, we investigate the resonant interactions between chorus wave and radiation belt electrons at different M-shells. Our results improve the current understanding of the statistical distribution properties of chorus waves and their role in the dynamics of radiation belt electrons at Jupiter.