Juno in situ observations of waves and particles connected to UV polar bright spots in Jupiter’s auroras

Since 2016, Juno observations have revealed key information to improve our understanding of Jupiter, and its powerful auroras, in particular. The unique combination of scientific instruments onboard the spacecraft allows studying auroral events on Jupiter synergistically through various mediums. This work presents results from in-situ observations related to an auroral "bright spots" in the Jupiter’s polar auroral region. We focus on the time intervals during which the spacecraft flew above the polar regions close to the bright spot positions during perijove 3 (PJ3) and PJ15 observed by the Juno-UVS, JEDI, MAG, and Waves instruments. Our analysis shows that, during the bright spot emissions, the energetic particles were enhanced and dominated by the upward electrons. The northern bright spot in PJ3 displayed a higher emitted power than the southern bright spot found in PJ15. Similarly, the upward electron intensities observed by JEDI during PJ3 were higher than those observed in PJ15. In addition, we notice that the whistler-mode waves observed by the Waves instrument were first relatively intense during this time interval and then damped as the electron fluxes increased, suggesting the presence of wave-particle interactions. Since the bright spot emissions are found within these time intervals, our observations suggest that these wave-particle interactions contribute to the process that accelerates particles and produces UV emissions.