Io's Effect on Energetic Charged Particles as Seen in Juno Data

Paranicas, C.; Mauk, B.H.; Haggerty, D.K.; Clark, G.; Kollmann, P.; Rymer, A.M.; Westlake, J.; Allen, R.C.; Szalay, J.; Ebert, R.W.; Sulaiman, A.H.; Imai, M.; Roussos, Elias; Krupp, Norbert; Nénon, Q.; Bagenal, F.; Bolton, S. J.

doi:10.1029/2019GL085393

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Io's Effect on Energetic Charged Particles as Seen in Juno Data

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Roussos, Elias
Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;

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Krupp, Norbert
Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;

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Paranicas, C., Mauk, B., Haggerty, D., Clark, G., Kollmann, P., Rymer, A., Westlake, J., Allen, R., Szalay, J., Ebert, R., Sulaiman, A., Imai, M., Roussos, E., Krupp, N., Nénon, Q., Bagenal, F., & Bolton, S. J. (2019). Io's Effect on Energetic Charged Particles as Seen in Juno Data. Geophysical Research Letters, 46(23), 13615-13620. doi:10.1029/2019GL085393.

引用: https://hdl.handle.net/21.11116/0000-0005-B96B-3

要旨

On 12 February 2019, the Juno spacecraft crossed the particle drift shells (L shells) of the moon Io. The energetic particle detector, Jupiter Energetic Particle Detector Instrument (JEDI), found very low fluxes of energetic protons when the spacecraft was inward of about L~6.5. Recent modeling suggests wave‐particle interactions may explain why energetic proton fluxes measured at these radial distances are low. JEDI also measured both a wide and a narrow decrease in the energetic electron count rate in Io's wake. At the time of this decrease, the JEDI detectors were dominated by 0.42 to 10‐MeV electrons. The dimensions of the narrow count rate decrease are about three Io diameters and are unlikely to be caused by absorption by moon itself.