Vincent Hue
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View article: Spatial variability of CH4 and C2H2 absorptions in Jupiter's auroral regions from Juno-UVS observations
Spatial variability of CH4 and C2H2 absorptions in Jupiter's auroral regions from Juno-UVS observations Open
Color ratios derived from molecular hydrogen emissions provide valuable diagnostics for the energy of precipitating electrons and the structure of the auroral atmosphere. We aim to characterize the horizontal and vertical variability of hy…
View article: Space Telescope Imaging Spectrograph Observations of Europa’s Optical Aurora
Space Telescope Imaging Spectrograph Observations of Europa’s Optical Aurora Open
We analyzed Hubble Space Telescope observations of Europa’s optical aurora, yielding further insight into the composition of its tenuous atmosphere and its plasma-interaction variability. We obtained these observations of auroral emissions…
View article: A bright path under Juno's footprint
A bright path under Juno's footprint Open
Juno's UltraViolet Spectrograph captures spectrally resolved images of Jupiter's aurorae by scanning a narrow swath across the planet for every rotation of the spacecraft. A mirror at the entrance of the instrument allows us to aim for spe…
View article: Characterizing Auroral Acceleration Mechanisms at Jupiter: Statistical Analyses of Juno-UVS-Derived Electron Energies.
Characterizing Auroral Acceleration Mechanisms at Jupiter: Statistical Analyses of Juno-UVS-Derived Electron Energies. Open
Resulting from the precipitation of magnetospheric particles into the upper atmosphere, planetary aurorae form an image of the dynamics of the magnetosphere and its coupling with the ionosphere and atmosphere. Hence, exploring the upper at…
View article: The moon-induced auroral emissions at Jupiter: a natural probe of the atmosphere and magnetosphere
The moon-induced auroral emissions at Jupiter: a natural probe of the atmosphere and magnetosphere Open
The interaction between the four major moons of Jupiter - Io, Europa, Ganymede and Callisto - and the Jovian magnetic field generates satellite-induced auroral emissions, called footprints. These are caused by electrons precipitating into …
View article: Europa-UVS Commissioning and In-Flight Calibration Results and Plans Ahead with Europa Clipper
Europa-UVS Commissioning and In-Flight Calibration Results and Plans Ahead with Europa Clipper Open
The Europa Clipper mission launched on 14 October 2024, and includes the Europa Ultraviolet Spectrograph (Europa-UVS) instrument. Europa-UVS’s science goals are focused on Europa habitability goals, specifically: 1) Search for and characte…
View article: The length of the Io footprint: Spectral characterization using Juno-UVS
The length of the Io footprint: Spectral characterization using Juno-UVS Open
The vast Jovian magnetosphere is filled with plasma originating from Io's volcanic activity in the inner magnetosphere. This plasma is structured as a sheet in near-corotation with Jupiter's magnetic field and confined to the centrifugal e…
View article: Characterizing Precipitating Electrons in Ganymede’s Auroras through Juno/UVS observations and Coupled Electron Transport and Radiative Transfer Models
Characterizing Precipitating Electrons in Ganymede’s Auroras through Juno/UVS observations and Coupled Electron Transport and Radiative Transfer Models Open
Auroral emissions provide key insights into interactions between planetary magnetic fields, atmospheres, and surrounding plasma. While Jupiter’s aurorae are well-studied, those of Ganymede, the only moon with an intrinsic magnetic field in…
View article: Constraints on Primordial Hydrosphere Development in Io and Europa from Interior Thermal Models
Constraints on Primordial Hydrosphere Development in Io and Europa from Interior Thermal Models Open
The Galilean moons exhibit a radial gradient in bulk density that decreases with increasing distance from Jupiter, reflecting a corresponding increase in their ice-to-rock ratios. The origin of this compositional gradient remains a matter …
View article: Jupiter’s auroral stratosphere as revealed by IRTF-TEXES spectroscopy
Jupiter’s auroral stratosphere as revealed by IRTF-TEXES spectroscopy Open
Jupiter has the strongest planetary magnetic field and the most volcanically active moon (Io) in the solar system. Magnetospheric dynamics and interactions with the solar wind ultimately drive ions and electrons deep into its neutral atmos…
View article: Investigating Europa’s Atmosphere: Hubble Space Telescope Analysis and Europa-UVS Stellar Occultation Preparations
Investigating Europa’s Atmosphere: Hubble Space Telescope Analysis and Europa-UVS Stellar Occultation Preparations Open
Europa’s tenuous atmosphere remains poorly constrained to this day. It is primarily composed of O2 with a concentration of H2O near the subsolar point when the trailing hemisphere is illuminated and surrounded by an extended neutral cloud …
View article: Formation Conditions Leading to an Unmelted Callisto and a Differentiated Ganymede
Formation Conditions Leading to an Unmelted Callisto and a Differentiated Ganymede Open
Gravity data from the Galileo mission suggest that Callisto has a partially differentiated interior, in contrast to the globally molten state of Ganymede. This dichotomy poses unique challenges to theories of the formation and evolution of…
View article: Exploring the Enigmatic Depletion of Nitrogen and Sulfur in Uranus' Atmosphere: Clathrates, Oceans, and Formation Processes
Exploring the Enigmatic Depletion of Nitrogen and Sulfur in Uranus' Atmosphere: Clathrates, Oceans, and Formation Processes Open
The atmospheric composition of Uranus presents significant challenges to our understanding of the planet's formation, particularly the elemental abundances of nitrogen (N) and sulfur (S). Previous work, by our team and others, indicates th…
View article: Amateur Astronomer’s Support to ESA’s JUICE Mission
Amateur Astronomer’s Support to ESA’s JUICE Mission Open
JUICE (JUpiter ICy moons Explorer) is the first large mission in the Cosmic Vision 2015-2025 programme. The spacecraft was launched on April 2023 and will arrive at the Jupiter system in July 2031. The primary science goals of JUICE are to…
View article: Insights on the formation of Uranus and Neptune through thermochemical modelling
Insights on the formation of Uranus and Neptune through thermochemical modelling Open
Uranus and Neptune are the most distant and the least explored planets within our solar system. To this day, the formation history of these ice giants remains uncertain. Better understanding of their deep atmospheric composition helps cons…
View article: The Io plasma torus observed by Juno between 2016 and 2022
The Io plasma torus observed by Juno between 2016 and 2022 Open
Context . The Io plasma torus (IPT) is a dense, toroidal plasma cloud around Jupiter, approximately centered on Io’s orbit. Iogenic volcanic activity supplies material to the IPT, mainly through direct outgassing or sublimation of frozen v…
View article: Jupiter's UV Auroral Response to a Magnetospheric Compression Event
Jupiter's UV Auroral Response to a Magnetospheric Compression Event Open
The highly elliptical polar orbit of the Juno mission provides a unique opportunity to simultaneously measure the compression state of Jupiter's magnetosphere and the total power emitted by the planet's ultraviolet aurora, using a single s…
View article: Conditions for Accretion Favoring an Unmelted Callisto and a Differentiated Ganymede
Conditions for Accretion Favoring an Unmelted Callisto and a Differentiated Ganymede Open
Analysis of Callisto’s moments of inertia, derived from Galileo’s gravity data, suggests that its structure is not fully differentiated. This possibly undifferentiated state contrasts sharply with the globally molten state inferred in its …
View article: Jupiter's UV auroral response to a magnetospheric compression event
Jupiter's UV auroral response to a magnetospheric compression event Open
The highly elliptical polar orbit of the Juno mission provides a unique opportunity to simultaneously measure the compression state of Jupiter's magnetosphere and the total power emitted by the planet's ultraviolet aurora, using a single s…
View article: In Situ Analysis of Jupiter's Broadband Kilometric Auroral Radio Emissions With Juno
In Situ Analysis of Jupiter's Broadband Kilometric Auroral Radio Emissions With Juno Open
Among the zoo of Jovian auroral radio emissions, the broadband kilometric (bKOM) component has been the least studied. Taking advantage of Juno in situ measurements within the auroral regions, we surveyed the Juno/Waves radio observations …
View article: JWST observations of exogenic species on Jupiter: HCN, H<sub>2</sub>O, and CO<sub>2</sub>
JWST observations of exogenic species on Jupiter: HCN, H<sub>2</sub>O, and CO<sub>2</sub> Open
Context . The impact of the Shoemaker-Levy 9 (SL9) comet on Jupiter in 1994 opened up a new field of study focused on the exogenic species within Jupiter’s atmosphere. Among these species, we find H 2 O, CO, and HCN. It is thought that the…
View article: The moon-induced auroral emissions at Jupiter:a natural probe of the atmosphere and magnetosphere
The moon-induced auroral emissions at Jupiter:a natural probe of the atmosphere and magnetosphere Open
At Jupiter, the fast planetary rotation, the strong magnetic field and the presence of a relatively high density plasma create a powerful electromagnetic environment. Jupiter’s auroras are one evidence of the strong magnetospheric ac…
View article: A view from the other side: complementary observations of the Jovian UV aurorae from Hubble and Juno
A view from the other side: complementary observations of the Jovian UV aurorae from Hubble and Juno Open
Starting from the Jupiter approach phase in early 2016, several Hubble Space Telescope observation campaigns dedicated to the UV aurorae have been executed in order to support the Juno mission. For example, these images have been used to s…
View article: Earth-based monitoring&#160;of Io torus&#160;Proposition for a Community Project
Earth-based monitoring of Io torus Proposition for a Community Project Open
The moon Io, the most active volcanic body in the Solar System,  is the “energy convertor” of the Jupiter system: indeed, Io’s interior is  continuously heated by tidal interactions with Jupiter and the other Ga…
View article: Insights from Formation Scenarios into the Internal Differentiation of the Galilean Moons
Insights from Formation Scenarios into the Internal Differentiation of the Galilean Moons Open
The internal differentiation of the Galilean moons remains an open question. Gravity data from the Galileo mission indicate that Callisto's interior is only partially differentiated, while magnetic field observations suggest the presence o…
View article: Jovian Broadband Kilometric auroral radio emissions with in situ Juno measurements
Jovian Broadband Kilometric auroral radio emissions with in situ Juno measurements Open
In the vast array of Jovian auroral radio emissions, the broadband kilometric (bKOM) component (10-300 kHz) has received comparatively less research attention. Utilizing Juno in situ measurements within the auroral regions, a survey of Jun…
View article: Reconstruction of the 3D Auroral Structure Using Juno/UVS Observations
Reconstruction of the 3D Auroral Structure Using Juno/UVS Observations Open
Jovian auroras, the most intense in the Solar System, arise from interactions between Jupiter’s magnetosphere and atmosphere. While their horizontal morphology has been extensively studied, their vertical structure, shaped by the pen…
View article: Vertical and Temporal H<sub>3</sub> <sup>+</sup> Structure at the Auroral Footprint of Io
Vertical and Temporal H<sub>3</sub> <sup>+</sup> Structure at the Auroral Footprint of Io Open
We report the first observation of the vertical and temporal structure of the H 3 + emission at the auroral footprint of Io, as observed by Juno/JIRAM. The brightness vertical profile shows a maximum at 600 km above 1 bar, with no apparent…