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Io's Effect on Energetic Charged Particles as Seen in Juno Data
Author(s) -
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 E.,
Krupp N.,
Né Q.,
Bagenal F.,
Bolton S. J.
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl085393
Subject(s) - physics , proton , spacecraft , jupiter (rocket family) , electron , charged particle , particle (ecology) , detector , wave–particle duality , ion , atomic physics , nuclear physics , astronomy , optics , geology , oceanography , quantum mechanics
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.