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Temperature and Composition Disturbances in the Southern Auroral Region of Jupiter Revealed by JWST/MIRI

hal.structure.identifierPôle Planétologie du LESIA
dc.contributor.authorRODRÍGUEZ-OVALLE, Pablo
hal.structure.identifierPôle Planétologie du LESIA
dc.contributor.authorFOUCHET, Thierry
dc.contributor.authorGUERLET, Sandrine
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierASP 2024
hal.structure.identifierPôle Planétologie du LESIA
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.authorHUE, Vincent
dc.contributor.authorLÓPEZ-PUERTAS, Manuel
hal.structure.identifierPôle Planétologie du LESIA
dc.contributor.authorLELLOUCH, Emmanuel
dc.contributor.authorSINCLAIR, James
dc.contributor.authorDE PATER, Imke
dc.contributor.authorFLETCHER, Leigh
dc.contributor.authorWONG, Michael
dc.contributor.authorHARKETT, Jake
dc.contributor.authorORTON, Glenn
dc.contributor.authorHUESO, Ricardo
dc.contributor.authorSÁNCHEZ-LAVEGA, Agustín
dc.contributor.authorSTALLARD, Tom
hal.structure.identifierPôle Planétologie du LESIA
dc.contributor.authorBOCKELEE-MORVAN, Dominique
dc.contributor.authorKING, Oliver
dc.contributor.authorROMAN, Michael
dc.contributor.authorMELIN, Henrik
dc.date.issued2024-06-20
dc.identifier.issn2169-9097
dc.description.abstractEnAbstract Jupiter's South Polar Region (SPR) was observed by James Webb Space Telescope/Mid‐Infrared Instrument in December 2022. We used the Medium Resolution Spectrometer mode to provide new information about Jupiter's South Polar stratosphere. The southern auroral region was visible and influenced the atmosphere in several ways: (a) In the interior of the southern auroral oval, we retrieved peak temperatures at two distinct pressure levels near 0.01 and 1 mbar, with warmer temperatures with respect to non‐auroral regions of 12 ± 2 K and 37 ± 4 K respectively. A cold polar vortex is centered at 65°S at 10 mbar. (b) We found that the homopause is elevated to km above the 1‐bar pressure level inside the auroral oval compared to km at neighboring latitudes and with an upper altitude of 350 km in regions not affected by auroral precipitation. (c) The retrieved abundance of C 2 H 2 shows an increase within the auroral oval, and it exhibits high abundances throughout the polar region. The retrieved abundance of C 2 H 6 increases toward the pole, without being localized in the auroral oval, in contrast with previous analysis (Sinclair et al., 2018, https://doi.org/10.1016/j.icarus.2017.09.016 ). We determined that the warming at 0.01 mbar and the elevated homopause might be caused by the flux of charged particles depositing their energy in the SPR. The 1‐mbar hotspot may arise from adiabatic heating resulting from auroral‐driven downwelling. The cold region at 10 mbar may be caused by radiative cooling by stratospheric aerosols. The differences in spatial distribution seem to indicate that the hydrocarbons analyzed are affected differently by auroral precipitation.
dc.description.sponsorshipPréparer l'exploration du système de Jupiter avec JWST - ANR-21-CE49-0019
dc.language.isoen
dc.publisherWiley-Blackwell
dc.title.enTemperature and Composition Disturbances in the Southern Auroral Region of Jupiter Revealed by JWST/MIRI
dc.typeArticle de revue
dc.identifier.doi10.1029/2024JE008299
dc.subject.halPlanète et Univers [physics]
dc.identifier.arxiv2406.08133
bordeaux.journalJournal of Geophysical Research. Planets
bordeaux.volume129
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-04644175
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04644175v1
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