Print Email Facebook Twitter Hydrogen peroxide at the poles of Ganymede Title Hydrogen peroxide at the poles of Ganymede Author Trumbo, Samantha K. (Cornell Center for Astrophysics and Planetary Science) Brown, Michael E. (California Institute of Technology) Bockelée-Morvan, Dominique (LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique) de Pater, I. (TU Delft Astrodynamics & Space Missions; University of California) Fouchet, Thierry (LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique) Cazaux, S.M. (TU Delft Astrodynamics & Space Missions; Universiteit Leiden) Fletcher, Leigh N. (University of Leicester) de Kleer, Katherine (California Institute of Technology) Lellouch, Emmanuel (LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique) Date 2023 Abstract Ganymede is the only satellite in the solar system known to have an intrinsic magnetic field. Interactions between this field and the Jovian magnetosphere are expected to funnel most of the associated impinging charged particles, which radiolytically alter surface chemistry across the Jupiter system, to Ganymede's polar regions. Using observations obtained with JWST as part of the Early Release Science program exploring the Jupiter system, we report the discovery of hydrogen peroxide, a radiolysis product of water ice, specifically constrained to the high latitudes. This detection directly implies radiolytic modification of the polar caps by precipitation of Jovian charged particles along partially open field lines within Ganymede's magnetosphere. Stark contrasts between the spatial distribution of this polar hydrogen peroxide, those of Ganymede's other radiolytic oxidants, and that of hydrogen peroxide on neighboring Europa have important implications for understanding water-ice radiolysis throughout the solar system. To reference this document use: http://resolver.tudelft.nl/uuid:9e59fc28-f748-413a-8eb1-0b8f10f91e4b DOI https://doi.org/10.1126/sciadv.adg3724 ISSN 2375-2548 Source Science Advances, 9 (29), eadg3724 Part of collection Institutional Repository Document type journal article Rights © 2023 Samantha K. Trumbo, Michael E. Brown, Dominique Bockelée-Morvan, I. de Pater, Thierry Fouchet, S.M. Cazaux, Leigh N. Fletcher, Katherine de Kleer, Emmanuel Lellouch, More Authors Files PDF sciadv.adg3724.pdf 834.53 KB Close viewer /islandora/object/uuid:9e59fc28-f748-413a-8eb1-0b8f10f91e4b/datastream/OBJ/view