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View article: Delivery of complex organic molecules to the system of Jupiter
Delivery of complex organic molecules to the system of Jupiter Open
Complex organic molecules are key markers of molecular diversity, and their formation conditions in protoplanetary discs remain an active area of research. These molecules have been detected on a variety of celestial bodies, including icy …
View article: M‐Shell and Local Time Variability of the Electron and Magnetic Environments at the Orbit of Callisto as Observed by the Juno and Galileo Missions
M‐Shell and Local Time Variability of the Electron and Magnetic Environments at the Orbit of Callisto as Observed by the Juno and Galileo Missions Open
Jupiter's moon Callisto orbits in a highly variable magnetospheric environment depending on its position relative to the Jovian current sheet. The Juno and Galileo missions have visited the Jovian magnetosphere and crossed Callisto's orbit…
View article: Sequestration of noble gases in clathrate during the open ocean phase of Titan
Sequestration of noble gases in clathrate during the open ocean phase of Titan Open
Titan, visited by the Huygens probe in 2005, possess a nitrogen-rich atmosphere, surprisingly depleted in primordial noble gases such as 38Ar, Kr, and Xe. Since these gases would be expected to be present in Titan’s primordial composition …
View article: Unlocking the Secrets of Ice Giant Formation : The Role of Argon Isotopes in Decoding Uranus and Neptune's Composition
Unlocking the Secrets of Ice Giant Formation : The Role of Argon Isotopes in Decoding Uranus and Neptune's Composition Open
Understanding the formation and bulk composition of Uranus and Neptune remains one of the outstanding challenges in planetary science. These ice giants likely formed in a region of the protosolar nebula where both rocky and icy solids were…
View article: Uranus Revealed: What its D/H Ratio Tells Us About its Formation
Uranus Revealed: What its D/H Ratio Tells Us About its Formation Open
Uranus and Neptune are among the least studied bodies in our Solar System, and their composition and formation processes remain subjects of ongoing debate. Observations of these icy giants have shown that both planets are significantly enr…
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: Insight into the Primordial Origins of Methane on Eris and Makemake from D/H Ratios
Insight into the Primordial Origins of Methane on Eris and Makemake from D/H Ratios Open
Deuterium, a heavy isotope of hydrogen, serves as a vital tracer in understanding the formation and evolution of the Solar System. Recent observations by the James Webb Space Telescope (JWST) have significantly expanded the dataset of D/H …
View article: Formation and Survival of Complex Organic Matter in a Warm Jovian Circumplanetary Disk
Formation and Survival of Complex Organic Matter in a Warm Jovian Circumplanetary Disk Open
This study investigates the formation of complex organic molecules (COMs) in Jupiter’s circumplanetary disk (CPD) during its early, warm phases. This disk served as the formation environment for its major moons—Europa, Ganymede, and Callis…
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: Impact of self-shadowing on the Jovian Circumplanetary disk volatile ices distribution
Impact of self-shadowing on the Jovian Circumplanetary disk volatile ices distribution Open
Modelling the origin of Jupiter’s Galilean moons remains a significant challenge. While it is widely accepted that the moons formed within a circumplanetary disk (CPD) that surrounded Jupiter during the final stages of its formation, the p…
View article: On the chemical evolution of Europa’s hydrosphere during the accretion phase
On the chemical evolution of Europa’s hydrosphere during the accretion phase Open
Europa, one of Jupiter's Galilean moons and a primary target of the upcoming JUICE and Europa Clipper missions, is one of the most promising candidates for habitability in the Solar System, largely due to the presence of a subsurface ocean…
View article: The Voyage of Complex Organic Matter: From the Protosolar Nebula to the Galilean Moons
The Voyage of Complex Organic Matter: From the Protosolar Nebula to the Galilean Moons Open
The presence of carbonaceous material is inferred on the surfaces of numerous outer Solar System bodies, including the Galilean moons. Furthermore, the densities and moments of inertia of icy moons and dwarf planets suggest that such mater…
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: Comparing NASA Discovery and New Frontiers Class Mission Concepts for the Io Volcano Observer
Comparing NASA Discovery and New Frontiers Class Mission Concepts for the Io Volcano Observer Open
Jupiter’s moon Io is a highly compelling target for future exploration that offers critical insight into tidal dissipation processes and the geology of high heat flux worlds, including primitive planetary bodies, such as the early Earth, t…
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: Noble gas depletion on Titan: Clathrate sequestration during the open ocean phase
Noble gas depletion on Titan: Clathrate sequestration during the open ocean phase Open
A plausible explanation for the absence of primordial argon, krypton, and xenon in Titan’s current atmosphere is that these gases were sequestered in clathrate hydrates during Titan’s “open-ocean” phase. We examine how clathrate hydrate fo…
View article: Primordial Origin of Methane on Eris and Makemake Supported by D/H Ratios
Primordial Origin of Methane on Eris and Makemake Supported by D/H Ratios Open
Deuterium, a heavy isotope of hydrogen, is a key tracer of the formation of the solar system. Recent James Webb Space Telescope observations have expanded the data set of deuterium-to-hydrogen (D/H) ratios in methane on the KBOs Eris and M…
View article: Understanding the Formation of Saturn’s Regular Moons in the Context of Giant Planet Moons Formation Scenarios
Understanding the Formation of Saturn’s Regular Moons in the Context of Giant Planet Moons Formation Scenarios Open
This article explores the different formation scenarios of the Kronian moons system in the context of a highly dissipative Saturn, with the objective of identifying the most likely of these scenarios. First, we review the diversity of obje…
View article: Primordial Origin of Methane on Eris and Makemake Supported by D/H Ratios
Primordial Origin of Methane on Eris and Makemake Supported by D/H Ratios Open
Deuterium, a heavy isotope of hydrogen, is a key tracer of the formation of the Solar System. Recent JWST observations have expanded the dataset of D/H ratios in methane on the KBOs Eris and Makemake, providing new insights into their orig…
View article: Impact of self-shadowing on the Jovian Circumplanetary disk ice composition
Impact of self-shadowing on the Jovian Circumplanetary disk ice composition Open
Modeling the formation conditions of the Galilean moons remains a significant challenge. While it is widely assumed that the moons formed within a circumplanetary disk (CPD) that surrounded Jupiter during the final stages of its growth, th…
View article: Constraints on Uranus formation from its D/H ratio
Constraints on Uranus formation from its D/H ratio Open
The formation of the ice giants Uranus and Neptune remains poorly understood, with several competing hypotheses attempting to explain their observed compositions. In particular, the carbon enrichment and nitrogen depletion observed in thes…
View article: Earth-based monitoring of Io torus 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: A nearly terrestrial D/H for comet 67P/Churyumov-Gerasimenko
A nearly terrestrial D/H for comet 67P/Churyumov-Gerasimenko Open
Isotopic ratios of water can be used to trace the origin of water in our oceans, and comets have been proposed as a potential source. But cometary comae are a mixture of gas and ice-covered dust, and processing on the surface and in the co…
View article: Clathrate as a noble gas reservoir from the primordial hydrosphere of Titan 
Clathrate as a noble gas reservoir from the primordial hydrosphere of Titan  Open
Titan, visited by the Huygens probe in 2005, is the only moon in the solar system known to have a dense, nitrogen-rich atmosphere. It is also suspected to possess a subsurface global ocean beneath an ice crust. A striking characteristic of…
View article: Understanding the formation of Saturn's regular moons in the context of giant planet moons formation scenarios
Understanding the formation of Saturn's regular moons in the context of giant planet moons formation scenarios Open
This article explores the different formation scenarios of the Kronian moons system in the context of a highly dissipative Saturn, with the objective of identifying the most likely of these scenarios. First, we review the diversity of obje…
View article: Impact of Jupiter’s Heating and Self-shadowing on the Jovian Circumplanetary Disk Structure
Impact of Jupiter’s Heating and Self-shadowing on the Jovian Circumplanetary Disk Structure Open
Deciphering the structure of the circumplanetary disk (CPD) that surrounded Jupiter at the end of its formation is key to understanding how the Galilean moons formed. Three-dimensional hydrodynamic simulations have shown that this disk was…