P. Drossart
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View article: Constraints on the possible atmospheres on TRAPPIST-1 b: insights from 3D climate modeling
Constraints on the possible atmospheres on TRAPPIST-1 b: insights from 3D climate modeling Open
Context. JWST observations of the secondary eclipse of TRAPPIST-1 b at 12.8 and 15 µm revealed a very bright dayside. These measurements are consistent with an absence of atmosphere. Previous 1D atmospheric modeling also excludes – at firs…
View article: Analysis of disequilibrium chemistry in five exoplanets’ atmosphere
Analysis of disequilibrium chemistry in five exoplanets’ atmosphere Open
Studying chemical composition is fundamental to model the formation history of planets and planetary systems. With the first JWST data and the upcoming Ariel satellite, we expect a leap forward in the exoplanet’s atmosphere field. Most cur…
View article: Assessing the impact of instrumental systematics on Ariel spectrometer performance using simulated observations
Assessing the impact of instrumental systematics on Ariel spectrometer performance using simulated observations Open
Ariel is a European Space Agency (ESA) mission that aims to study the atmospheres of a large and diverse sample of transiting exoplanets (Tinetti et al. 2021). Scheduled for launch in 2029 to the L2 Lagrange point. Ariel will observe exopl…
View article: From atmospheres to exospheres in exoplanets
From atmospheres to exospheres in exoplanets Open
Interaction phenomena between atmospheric layers in planetary atmospheres give rise to highly complex exchanges influencing thermal structure, composition and dynamics. In particular, the question of hydrodynamic escape in exoplanet atmosp…
View article: ML approaches for exoplanet atmosphere characterization and detrending methods in the Ariel space mission
ML approaches for exoplanet atmosphere characterization and detrending methods in the Ariel space mission Open
The Ariel space mission is a European Space Agency (ESA) mission that aims to study the atmospheres of a large and diverse sample of transiting exoplanets (Tinetti et al. 2021). Scheduled for launch in 2029 to the L2 Lagrange point, Ariel …
View article: Zonal Wind Variability in Venus’ Mesosphere from VIRTIS/VEx Temperature Retrievals
Zonal Wind Variability in Venus’ Mesosphere from VIRTIS/VEx Temperature Retrievals Open
Introduction: We present zonal thermal winds derived by applying the cyclostrophic balance from the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) temperature retrievals. VIRTIS was one of the experiments on board the European …
View article: Moons and Jupiter Imaging Spectrometer (MAJIS) on Jupiter Icy Moons Explorer (JUICE)
Moons and Jupiter Imaging Spectrometer (MAJIS) on Jupiter Icy Moons Explorer (JUICE) Open
View article: A re-analysis of equilibrium chemistry in five exoplanets' atmosphere
A re-analysis of equilibrium chemistry in five exoplanets' atmosphere Open
Studying chemical composition is fundamental to modeling the formation history of planets and planetary systems. With the first JWST data and the upcoming Ariel satellite, we expect a leap forward in the exoplanet’s atmosphere field.…
View article: Zonal winds in Venus mesosphere from VIRTIS/VEx temperature retrievals
Zonal winds in Venus mesosphere from VIRTIS/VEx temperature retrievals Open
Venus is a natural laboratory to study the atmospheric circulation on a slowly rotating planet. The dynamics of its upper atmosphere (60-120 km) is a combination of retrograde zonal wind found in the lower mesosphere and solar-to-antisolar…
View article: A favorable sub-Neptune target for JWST and Ariel observations: TOI 1759 b
A favorable sub-Neptune target for JWST and Ariel observations: TOI 1759 b Open
Following the extensive exploration of hot and warm exoplanets over the past two decades, recent improvements in instrumental techniques, from ground and space, have allowed the detection of “temperate” exoplanets, with equilib…
View article: ARES VI: Viability of one-dimensional retrieval models for transmission spectroscopy characterization of exo-atmospheres in the era of JWST and Ariel
ARES VI: Viability of one-dimensional retrieval models for transmission spectroscopy characterization of exo-atmospheres in the era of JWST and Ariel Open
Observed exoplanet transit spectra are usually retrieved using 1D models to determine atmospheric composition while planetary atmospheres are 3D. With the JWST and future space telescopes such as Ariel, we will be able to obtain increasing…
View article: ARES
ARES Open
Observed exoplanet transit spectra are usually retrieved using 1D models to determine atmospheric composition. However, planetary atmospheres are 3D. With the new state-of-the-art James Webb Space Telescope (JWST) and future space telescop…
View article: Jupiter Science Enabled by ESA’s Jupiter Icy Moons Explorer
Jupiter Science Enabled by ESA’s Jupiter Icy Moons Explorer Open
View article: Minor species in Venus’ night side troposphere as observed by VIRTIS-H/Venus Express
Minor species in Venus’ night side troposphere as observed by VIRTIS-H/Venus Express Open
View article: A re-analysis of equilibrium chemistry in five hot Jupiters
A re-analysis of equilibrium chemistry in five hot Jupiters Open
Aims. Studies of chemistry and chemical composition are fundamental to exploring the formation histories of planets and planetary systems. We propose having another look at five targets to better determine their composition and the chemica…
View article: Jupiter Science Enabled by ESA's Jupiter Icy Moons Explorer
Jupiter Science Enabled by ESA's Jupiter Icy Moons Explorer Open
ESA's Jupiter Icy Moons Explorer (JUICE) will provide a detailed investigation of the Jovian system in the 2030s, combining a suite of state-of-the-art instruments with an orbital tour tailored to maximise observing opportunities. We revie…
View article: Characterization and modelling of exoplanetary atmospheres
Characterization and modelling of exoplanetary atmospheres Open
The spectral characterization of exoplanetary atmospheres is a relatively new subject. Until recently, space and ground-based observatories allowed only a few planets to be observed with spectroscopic instruments. The arrival of JWST data …
View article: Zonal winds in the Venus mesosphere from VIRTIS/VEx temperature sounding 
Zonal winds in the Venus mesosphere from VIRTIS/VEx temperature sounding  Open
<p><strong> Introduction</strong></p> <p>We present zonal thermal winds derived by applying the cyclostrophic balance from the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) temperature retrievals.…
View article: Minor species measurements below the clouds of Venus using VIRTIS-H/Venus Express data set.
Minor species measurements below the clouds of Venus using VIRTIS-H/Venus Express data set. Open
<p>From 2006 to 2014, the ESA <em>Venus Express</em> orbiter has provided a wealth of data that has not been fully analyzed yet. Here, using all available and suitable night side thermal spectra provided by the -H channel…
View article: Water ortho-to-para ratio in the coma of comet 67P/Churyumov-Gerasimenko
Water ortho-to-para ratio in the coma of comet 67P/Churyumov-Gerasimenko Open
Context. Abundance ratios of the nuclear-spin isomers of H 2 O and NH 3 have been measured in about two dozen comets, with a mean value corresponding to a nuclear-spin temperature of ~30 K. The real meaning of these unequilibrated nuclear-…
View article: ARES.* V. No Evidence For Molecular Absorption in the HST WFC3 Spectrum of GJ 1132 b
ARES.* V. No Evidence For Molecular Absorption in the HST WFC3 Spectrum of GJ 1132 b Open
We present a study on the spatially scanned spectroscopic observations of the transit of GJ 1132 b, a warm (∼500 K) super-Earth (1.13 R ⊕ ) that was obtained with the G141 grism (1.125–1.650 μ m) of the Wide Field Camera 3 (WFC3) on board …
View article: Ariel: Enabling planetary science across light-years
Ariel: Enabling planetary science across light-years Open
Ariel, the Atmospheric Remote-sensing Infrared Exoplanet Large-survey, was adopted as the fourth medium-class mission in ESA's Cosmic Vision programme to be launched in 2029. During its 4-year mission, Ariel will study what exoplanets are …
View article: A chemical composition map for Titan&#8217;s surface
A chemical composition map for Titan’s surface Open
<p>The investigation of Titan’s surface chemical composition is of great importance for the understanding of the atmosphere-surface-interior system of the moon. The Cassini cameras and especially the Visual and infrared Map…
View article: Venus nightside atmosphere maps: cloud opacity, particle size and cloud top temperature seen by VIRTIS/Venus Express
Venus nightside atmosphere maps: cloud opacity, particle size and cloud top temperature seen by VIRTIS/Venus Express Open
In this work we have produced global maps of Venus nightside atmosphere using the complete infrared dataset of VIRTIS mapping channel onboard Venus Express between 2006 and 2008. Despite the local variability and high dynamics of the cloud…
View article: The chemical composition of impact craters on Titan
The chemical composition of impact craters on Titan Open
We investigate the spectral behavior of nine Titan impact craters in order to constrain their surface composition using Visual and Infrared Mapping Spectrometer (VIMS) data and a radiative transfer code (RT) [e.g. 1] in addition to emissiv…
View article: The chemical composition of impact craters on Titan
The chemical composition of impact craters on Titan Open
We investigate the spectral behavior of nine Titan impact craters in order to constrain their composition. Past studies that have examined the chemical composition of impact craters on Titan have either used qualitative comparisons between…
View article: ARES. II. Characterizing the Hot Jupiters WASP-127 b, WASP-79 b, and WASP-62b with the Hubble Space Telescope
ARES. II. Characterizing the Hot Jupiters WASP-127 b, WASP-79 b, and WASP-62b with the Hubble Space Telescope Open
This paper presents the atmospheric characterization of three large, gaseous planets: WASP-127 b, WASP-79 b, and WASP-62 b. We analyzed spectroscopic data obtained with the G141 grism (1.088–1.68 μm) of the Wide Field Camera 3 on board the…
View article: ARES. III. Unveiling the Two Faces of KELT-7 b with HST WFC3*
ARES. III. Unveiling the Two Faces of KELT-7 b with HST WFC3* Open
We present the analysis of the hot-Jupiter KELT-7 b using transmission and emission spectroscopy from the Hubble Space Telescope, both taken with the Wide Field Camera 3. Our study uncovers a rich transmission spectrum that is consistent w…
View article: Participation of women scientists in ESA solar system missions: a historical trend
Participation of women scientists in ESA solar system missions: a historical trend Open
We analyzed the participation of women scientists in 10 ESA (European Space Agency) Solar System missions over a period of 38 years. Being part of a spacecraft mission science team can be considered a proxy to measure the “success” in the …
View article: The chemical composition of impact craters on Titan
The chemical composition of impact craters on Titan Open
We investigate the spectral behavior of nine Titan impact craters in order to constrain their composition. Past studies that have examined the chemical composition of impact craters on Titan have either used qualitative comparisons between…