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Source of Radio Emissions Induced by the Galilean Moons Io, Europa and Ganymede: In Situ Measurements by Juno

hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
hal.structure.identifierSchool of Cosmic Physics [Dublin]
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
dc.contributor.authorLOUIS, C
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
dc.contributor.authorLOUARN, P.
dc.contributor.authorCOLLET, B.
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
dc.contributor.authorAL SAATI, S.
hal.structure.identifierPrinceton University
dc.contributor.authorSZALAY, J
dc.contributor.authorHUE, V.
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
dc.contributor.authorLAMY, L.
dc.contributor.authorKOTSIAROS, S.
hal.structure.identifierUniversity of Iowa [Iowa City]
dc.contributor.authorKURTH, W
hal.structure.identifierSchool of Cosmic Physics [Dublin]
dc.contributor.authorJACKMAN, C
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
hal.structure.identifierState Key Laboratory of Space Weather [Beijing] [SKSW]
hal.structure.identifierCollege of Earth and Planetary Sciences [Beijing]
dc.contributor.authorWANG, Y.
hal.structure.identifierInstitut de recherche en astrophysique et planétologie [IRAP]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorBLANC, M.
hal.structure.identifierSouthwest Research Institute [San Antonio] [SwRI]
dc.contributor.authorALLEGRINI, F.
hal.structure.identifierSpace Systems Research Corporation [SSRC]
dc.contributor.authorCONNERNEY, J
hal.structure.identifierNASA Goddard Space Flight Center [GSFC]
dc.contributor.authorGERSHMAN, D.
dc.date.issued2023
dc.identifier.issn2169-9380
dc.description.abstractEnAt Jupiter, part of the auroral radio emissions are induced by the Galilean moons Io, Europa and Ganymede. Until now, except for Ganymede, they have been only remotely detected, using ground-based radio-telescopes or electric antennas aboard spacecraft. The polar trajectory of the Juno orbiter allows the spacecraft to cross the range of magnetic flux tubes which sustain the various Jupiter-satellite interactions, and in turn to sample in situ the associated radio emission regions. In this study, we focus on the detection and the characterization of radio sources associated with Io, Europa and Ganymede. Using electric wave measurements or radio observations (Juno/Waves), in situ electron measurements (Juno/JADE-E), and magnetic field measurements (Juno/MAG) we demonstrate that the Cyclotron Maser Instability (CMI) driven by a loss-cone electron distribution function is responsible for the encountered radio sources. We confirmed that radio emissions are associated with Main (MAW) or Reflected Alfvén Wing (RAW), but also show that for Europa and Ganymede, induced radio emissions are associated with Transhemispheric Electron Beam (TEB). For each traversed radio source, we determine the latitudinal extension, the CMI-resonant electron energy, and the bandwidth of the emission. We show that the presence of Alfvén perturbations and downward field-aligned currents are necessary for the radio emissions to be amplified.
dc.language.isoen
dc.publisherAmerican Geophysical Union/Wiley
dc.title.enSource of Radio Emissions Induced by the Galilean Moons Io, Europa and Ganymede: In Situ Measurements by Juno
dc.typeArticle de revue
dc.identifier.doi10.1029/2023JA031985
dc.subject.halPlanète et Univers [physics]
bordeaux.journalJournal of Geophysical Research Space Physics
bordeaux.peerReviewedoui
hal.identifierhal-04350609
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04350609v1
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