Poynting Fluxes, Field-Aligned Current Densities, and the Efficiency of the Io-Jupiter Electrodynamic Interaction

A. H. Sulaiman; J. R. Szalay; G. Clark; F. Allegrini; F. Bagenal; M. J. Brennan; J. E. P. Connerney; V. Hue; W. S. Kurth; R. L. Lysak; J. D. Nichols; J. Saur; S. J. Bolton

doi:10.1029/2023GL103456

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Poynting Fluxes, Field-Aligned Current Densities, and the Efficiency of the Io-Jupiter Electrodynamic Interaction

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Poynting Fluxes, Field-Aligned Current Densities, and the Efficiency of the Io-Jupiter Electrodynamic Interaction

A. H. Sulaiman, J. R. Szalay, G. Clark, F. Allegrini, F. Bagenal, M. J. Brennan, J. E. P. Connerney, V. Hue, W. S. Kurth, R. L. Lysak, …

Geophysical research letters, Vol.50(10), e2023GL103456

05/28/2023

DOI: 10.1029/2023GL103456

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Abstract

Juno's highly inclined orbits provide opportunities to sample high-latitude magnetic field lines connected to the orbit of Io, among the other Galilean satellites. Its payload offers both remote-sensing and in-situ measurements of the Io-Jupiter interaction. These are at discrete points along Io's footprint tail and at least one event (12th perijove) was confirmed to be on a flux tube Alfvenically connected to Io, allowing for an investigation of how the interaction evolves down-tail. Here we present Alfven Poynting fluxes and field-aligned current densities along field lines connected to Io and its orbit. We explore their dependence as a function of down-tail distance and show the expected decay as seen in UV brightness and electron energy fluxes. We show that the Alfven Poynting and electron energy fluxes are highly correlated and related by an efficiency that is fully consistent with acceleration from Alfven wave filamentation via a turbulent cascade process.

Geology

Physical Sciences

Geosciences, Multidisciplinary

Science & Technology

Details

Title: Subtitle: Poynting Fluxes, Field-Aligned Current Densities, and the Efficiency of the Io-Jupiter Electrodynamic Interaction
Creators: A. H. Sulaiman - University of Minnesota
J. R. Szalay - Princeton University
G. Clark - Johns Hopkins University Applied Physics Laboratory
F. Allegrini - Southwest Research Institute
F. Bagenal - Laboratory for Atmospheric and Space Physics
M. J. Brennan - Jet Propulsion Laboratory
J. E. P. Connerney - Goddard Space Flight Center
V. Hue - Aix-Marseille Université
W. S. Kurth - University of Iowa
R. L. Lysak - University of Minnesota
J. D. Nichols - University of Leicester
J. Saur - University of Cologne
S. J. Bolton - Southwest Research Institute
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.50(10), e2023GL103456
DOI: 10.1029/2023GL103456
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: Amer Geophysical Union
Number of pages: 9
Grant note: 699041X / NASA; National Aeronautics & Space Administration (NASA) Roy J. Carver Charitable Trust 80NSSC23K0276 / NASA NFDAP Grant Southwest Research Institute
Language: English
Date published: 05/28/2023
Academic Unit: Physics and Astronomy
Record Identifier: 9984455285402771

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