Hydrogen peroxide at the poles of Ganymede

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...

An Energetic Eruption With Associated SO 1.707 Micron Emissions at Io's Kanehekili Fluctus and a Brightening Event at Loki Patera Observed by JWST

We observed Io with the James Webb Space Telescope (JWST) while the satellite was in eclipse, and detected thermal emission from several volcanoes. The data were taken as part of our JWST-ERS program #1373 on 15 November 2022. Kanehekili Fluctus was exceptionally bright, and Loki Patera had most likely entered a new brightening phase. Spectra...

Erratum: High spatial and spectral resolution observations of the forbidden 1.707 μm rovibronic SO emissions on Io: Evidence for widespread stealth volcanism (Planetary Science Journal (2020) 1 (29) DOI: 10.3847/PSJ/ab9eb1)

Several figures (Figures 5, 6, 8, 12, 13, 14) had the units off. This has been corrected in the versions below. This did not affect our results.(Figure Presented).

High spatial and spectral resolution observations of the forbidden 1.707 μm rovibronic so emissions on Io: Evidence for widespread stealth volcanism

We present observations obtained with the 10 m Keck telescopes of the forbidden SO a1Δ→X3Σ− rovibronic transition at 1.707 μm on Io while in eclipse. We show its spatial distribution at a resolution of ∼0 12 and a spectral resolution of R∼2500, as well as disk-integrated spectra at a high spectral resolution (R∼15,000). Both the spatial...

ALMA observations of Io going into and coming out of eclipse

We present mm observations constructed from Atacama Large (sub)Millimeter Array (ALMA) data of SO2, SO, and KCl when Io went from sunlight into eclipse (2018 March 20) and vice versa (2018 September 2 and 11). There is clear evidence of volcanic plumes on March 20 and September 2. The plumes distort the line profiles, causing high-velocity (...