Journal article
Plasma measurements in the Jovian polar region with Juno/JADE
Geophysical research letters, Vol.44(14), pp.7122-7130
07/28/2017
DOI: 10.1002/2017GL072837
Abstract
Jupiter's main auroral oval provides a window into the complex magnetospheric dynamics of the Jovian system. The Juno spacecraft entered orbit about Jupiter on 5 July 2016 and carries on board the Auroral Distributions Experiment (JADE) that can directly sample the auroral plasma structures. Here we identify five distinct regimes in the JADE data based on composition/energy boundaries and magnetic field mappings, which exhibit considerable symmetry between the northern and southern passes. These intervals correspond to periods when Juno was connected to the Io torus, inner plasma sheet, middle plasma sheet, outer plasma sheet, and the polar region. When connected to the torus and inner plasma sheet, the heavy ions are consistent with a corotating pickup population. For Juno's first perijove, we do not find evidence for a broad auroral acceleration region at Jupiter's main auroral oval for energies below 100 keV.
Key Points
Juno/JADE made high temporal resolution measurements at high latitudes of the Io torus and plasma sheet plasma populations
We identify regions where Juno was connected to the Io torus, inner plasma sheet, middle plasma sheet, outer plasma sheet, and high‐latitude polar region
For JADE's first auroral transits at ~0.7 RJ altitude and <100 keV, we find no evidence for a broad Jovian auroral acceleration region
Details
- Title: Subtitle
- Plasma measurements in the Jovian polar region with Juno/JADE
- Creators
- J. R. Szalay - Southwest Research InstituteF. Allegrini - Southwest Research InstituteF. Bagenal - Laboratory for Atmospheric and Space PhysicsS. Bolton - Southwest Research InstituteG. Clark - Johns Hopkins University Applied Physics LaboratoryJ. E. P. Connerney - Goddard Space Flight CenterL. P. Dougherty - Laboratory for Atmospheric and Space PhysicsR. W. Ebert - Southwest Research InstituteD. J. Gershman - Goddard Space Flight CenterW. S. Kurth - University of IowaS. Levin - Jet Propulsion LaboratoryP. Louarn - Research Institute in Astrophysics and PlanetologyB. Mauk - Johns Hopkins University Applied Physics LaboratoryD. J. McComas - Southwest Research InstituteC. Paranicas - Johns Hopkins University Applied Physics LaboratoryD. Ranquist - Laboratory for Atmospheric and Space PhysicsM. RenoM. F. Thomsen - Planetary Science InstituteP. W. Valek - Southwest Research InstituteS. Weidner - Princeton Plasma Physics LaboratoryR. J. Wilson - Laboratory for Atmospheric and Space Physics
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.44(14), pp.7122-7130
- DOI
- 10.1002/2017GL072837
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Number of pages
- 9
- Language
- English
- Date published
- 07/28/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455264602771
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