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A High Spatial and Spectral Resolution Study of Jupiter’s Mid-infrared Auroral Emissions and Their Response to a Solar Wind Compression

dc.contributor.authorSINCLAIR, James
dc.contributor.authorGREATHOUSE, Thomas
dc.contributor.authorGILES, Rohini
dc.contributor.authorLACY, John
dc.contributor.authorMOSES, Julianne
dc.contributor.authorHUE, Vincent
dc.contributor.authorGRODENT, Denis
dc.contributor.authorBONFOND, Bertrand
dc.contributor.authorTAO, Chihiro
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierASP 2023
hal.structure.identifierLaboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
dc.contributor.authorCAVALIÉ, Thibault
dc.contributor.authorDAHL, Emma
dc.contributor.authorORTON, Glenn
dc.contributor.authorFLETCHER, Leigh
dc.contributor.authorIRWIN, Patrick
dc.date.issued2023-04-27
dc.identifier.issn2632-3338
dc.description.abstractEnAbstract We present mid-infrared spectroscopy of Jupiter's mid-to-high latitudes using the Gemini-North/Texas Echelon Cross Echelle Spectrograph on 2017 March 17–19. These observations capture Jupiter’s hydrocarbon auroral emissions before, during, and after the arrival of a solar wind compression on March 18, which highlights the coupling between the polar stratosphere and external space environment. In comparing observations on March 17 and 19, we observe a brightening of the CH 4 , C 2 H 2 , and C 2 H 4 emission in regions spatially coincident with the northern duskside main auroral emission (MAE). In inverting the spectra to derive atmospheric information, we determine that the duskside brightening results from upper stratospheric ( p < 0.1 mbar/ z > 200 km) heating (e.g., Δ T = 9.1 ± 2.1 K at 9 μ bar at 67.°5N, 162.°5W) with negligible heating at deeper pressures. Our interpretation is that the arrival of the solar wind enhancement drove magnetospheric dynamics through compression and/or viscous interactions on the flank. These dynamics accelerated currents and/or generated higher Poynting fluxes, which ultimately warmed the atmosphere through Joule heating and ion-neutral collisions. Poleward of the southern MAE, temperature retrievals demonstrate that auroral-related heating penetrates as deep as the 10 mbar level, in contrast to poleward of the northern MAE, where heating is only observed as deep as ∼3 mbar. We suggest that this results from the south having higher Pedersen conductivities and therefore stronger currents and acceleration of the neutrals, as well as the poleward heating overlapping with the apex of Jupiter's circulation, thereby inhibiting efficient horizontal mixing/advection.
dc.language.isoen
dc.publisherIOP Science
dc.title.enA High Spatial and Spectral Resolution Study of Jupiter’s Mid-infrared Auroral Emissions and Their Response to a Solar Wind Compression
dc.typeArticle de revue
dc.identifier.doi10.3847/PSJ/accb95
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxiv2304.08390
bordeaux.journalThe Planetary Science Journal
bordeaux.page76
bordeaux.volume4
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-04236027
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04236027v1
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