Influence Of The Jovian Current Sheet Models On The Mapping Of The UV Auroral Footprints Of Io, Europa, And Ganymede

Influence Of The Jovian Current Sheet Models On The Mapping Of The UV Auroral Footprints Of Io, Europa, And Ganymede

(a) Time-Vitality-Differential Quantity Flux (DNF) spectrogram of the JADE-E information
recorded throughout Juno’s twelfth perijove. (b) Magnetic projection of Juno’s place onto the orbital airplane of the Galilean moons (inexperienced curves) and Juno’s M-Shell (pink curves) calculated with
JRM33+KK2005 (dashed strains) and JRM33+CON2020 (plain strains). Vertical blue strains at 09:15:42
and 09:20:46 spotlight the magnetic flux tubes crossings of Europa and Io, respectively. Juno’s place and velocity with respect to Jupiter are indicated beneath the sub-panel (b). — astro-ph.EP

The in-situ characterization of moon-magnetosphere interactions at Jupiter and the mapping of moon auroral footpaths require correct international fashions of the magnetospheric magnetic area.

On this examine, we evaluate the flexibility of two widely-used present sheet fashions, Khurana-2005 (KK2005) and Connerney-2020 (CON2020) mixed with the latest measurements acquired at low, medium, and excessive latitudes. With the changes of the KK2005 mannequin to JRM33, we present that within the outer and center magnetosphere (R>15RJ), JRM33+KK2005 is discovered to be the most effective mannequin to breed the magnetic area observations of Galileo and Juno because it accounts for native time results. JRM33+CON2020 offers essentially the most correct illustration of the inside magnetosphere.

This discovering is drawn from comparisons with Juno in-situ magnetic area measurements and confirmed by contrasting the timing of the crossings of the Io, Europa, and Ganymede flux tubes recognized within the Juno particles information with the 2 mannequin estimates. JRM33+CON2020 additionally maps extra precisely the UV auroral footpath of Io, Europa, and Ganymede noticed by Juno than JRM33+KK2005. The JRM33+KK2005 mannequin predicts a neighborhood time asymmetry in place of the moons’ footprints, which is nevertheless not detected in Juno’s UV measurements.

This might point out that native time results on the magnetic area are marginal on the orbital areas of Io, Europa, and Ganymede. Lastly, the accuracy of the fashions and their predictions as a perform of hemisphere, native time, and longitude is explored.

Jonas Rabia, Quentin Nénon, Nicolas André, Vincent Hue, Daniel Santos-Costa, Aneesah Kamran, Michel Blanc

Feedback: 22 pages, 9 figures, 1 desk. Accepted for publication in Journal of Geophysical Analysis: Area physics
Topics: Earth and Planetary Astrophysics (astro-ph.EP); Area Physics (
Cite as: arXiv:2401.10115 [astro-ph.EP] (or arXiv:2401.10115v1 [astro-ph.EP] for this model)
Associated DOI:
Focus to be taught extra
Submission historical past
From: Jonas Rabia
[v1] Thu, 18 Jan 2024 16:41:01 UTC (10,973 KB)


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