A5000781481- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Laser-induced spectroscopy and plasma
- Isotope Analysis in Ecology
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Geology and Paleoclimatology Research
- Space Science and Extraterrestrial Life
- Geochemistry and Geologic Mapping
- Spacecraft and Cryogenic Technologies
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Analytical chemistry methods development
- Methane Hydrates and Related Phenomena
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Spaceflight effects on biology
- Hydrocarbon exploration and reservoir analysis
- Aeolian processes and effects
- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Solar and Space Plasma Dynamics
- Advanced Chemical Sensor Technologies
- Scientific Research and Discoveries
Institut de Recherche en Astrophysique et Planétologie
2016-2025
Université de Toulouse
2016-2025
Université Toulouse III - Paul Sabatier
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Centre National d'Études Spatiales
2024
Institute for Resource Analysis and Policy
2013-2023
Observatoire Midi-Pyrénées
2012-2022
Roche (France)
2012-2022
European Space Research and Technology Centre
2017
Los Alamos National Laboratory
2009-2014
The ChemCam instrument suite on the Mars Science Laboratory (MSL) rover Curiosity provides remote compositional information using first laser-induced breakdown spectrometer (LIBS) a planetary mission, and sample texture morphology data micro-imager (RMI). Overall, supports MSL with five capabilities: classification of rock soil characteristics; quantitative elemental compositions including light elements like hydrogen some to which LIBS is uniquely sensitive (e.g., Li, Be, Rb, Sr, Ba);...
The ChemCam instrument package on the Mars Science Laboratory rover, Curiosity, is first planetary science to employ laser-induced breakdown spectroscopy (LIBS) determine compositions of geological samples another planet. Pre-processing spectra involves subtracting ambient light background, removing noise, electron continuum, calibrating for wavelength, correcting variable distance target, and applying a wavelength-dependent correction response. Further processing data uses multivariate...
The ChemCam instrument, which provides insight into martian soil chemistry at the submillimeter scale, identified two principal types along Curiosity rover traverse: a fine-grained mafic type and locally derived, coarse-grained felsic type. component is representative of widespread soils similar in composition to dust. It possesses ubiquitous hydrogen signature spectra, corresponding hydration amorphous phases found by CheMin instrument. This likely accounts for an important fraction global...
Abstract The Curiosity rover has analyzed abundant light‐toned fracture‐fill material within the Yellowknife Bay sedimentary deposits. ChemCam instrument, coupled with Mastcam and ChemCam/Remote Micro Imager images, was able to demonstrate that these fracture fills consist of calcium sulfate veins, many which appear be hydrated at a level expected for gypsum bassanite. Anhydrite is locally present found in location characterized by nodular texture. An intricate assemblage veins crosses...
The Philae lander provides a unique opportunity to investigate the internal structure of comet nucleus, providing information about its formation and evolution in early solar system. We present Comet Nucleus Sounding Experiment by Radiowave Transmission (CONSERT) measurements interior 67P/Churyumov-Gerasimenko. From propagation time form signals, upper part "head" 67P is fairly homogeneous on spatial scale tens meters. CONSERT also reduced size uncertainty Philae's final landing site down...
Abstract On the NASA 2020 rover mission to Jezero crater, remote determination of texture, mineralogy and chemistry rocks is essential quickly thoroughly characterize an area optimize selection samples for return Earth. As part Perseverance payload, SuperCam a suite five techniques that provide critical complementary observations via Laser-Induced Breakdown Spectroscopy (LIBS), Time-Resolved Raman Luminescence (TRR/L), visible near-infrared spectroscopy (VISIR), high-resolution color imaging...
The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river deposits. We report observations of the crater floor, below crater's sedimentary delta, finding that floor consists igneous rocks altered by water. lowest exposed unit, informally named Séítah, is a coarsely crystalline olivine-rich rock, which accumulated at base magma body. Magnesium-iron carbonates along grain boundaries indicate reactions with carbon dioxide-rich water under water-poor conditions....
Before Perseverance, Jezero crater's floor was variably hypothesized to have a lacustrine, lava, volcanic airfall, or aeolian origin. SuperCam observations in the first 286 Mars days on revealed and intrusive terrain with compositional density stratification. The dominant lithology along traverse is basaltic, plagioclase enrichment stratigraphically higher locations. Stratigraphically lower, layered rocks are richer normative pyroxene. lowest observed unit has highest inferred olivine-rich...
The Martian cryosphere is defined as that region of the crust where temperature remains continuously below freezing point water. Previous estimates its present thickness have ranged from ∼2.3–4.7 km at equator to ∼6.5–12.5 poles. Here we revisit these calculations, review some assumptions on which they were based, and investigate effects several parameters, not previously considered, cryosphere's thermal evolution extent. These include astronomically driven climate change,...
At Gale crater, Mars, ChemCam acquired its first laser-induced breakdown spectroscopy (LIBS) target on Sol 13 of the landed portion mission (a is a Mars day).
Abstract Textural and compositional analyses using Chemistry Camera (ChemCam) remote microimager laser‐induced breakdown spectroscopy (LIBS) have been performed on five float rocks coarse gravels along the first 100 m of Curiosity traverse at Bradbury Rise. ChemCam, LIBS instrument sent to another planet, offers opportunity assess mineralogic diversity grain‐size scales (~ µm) and, from this, lithologic diversity. Depth profiling indicates that targets are relatively free surface coatings....
Abstract The Curiosity rover observed high Mn abundances (>25 wt % MnO) in fracture‐filling materials that crosscut sandstones the Kimberley region of Gale crater, Mars. correlation between and trace metal plus lack elements such as S, Cl, C, reveals these deposits are oxides rather than evaporites or other salts. On Earth, environments concentrate deposit minerals require water highly oxidizing conditions; hence, findings suggest similar processes occurred on Based strong association...
Before Rosetta, the space missions Giotto and Stardust shaped our view on cometary dust, supported by plentiful data from Earth based observations interplanetary dust particles collected in Earth’s atmosphere. The Rosetta mission at comet 67P/Churyumov-Gerasimenko was equipped with a multitude of instruments designed to study dust. While an abundant amount presented several individual papers, many focused dedicated measurement or topic. Different instruments, methods, sources provide...
Abstract Before the Perseverance rover landing, acoustic environment of Mars was unknown. Models predicted that: (1) atmospheric turbulence changes at centimetre scales or smaller point where molecular viscosity converts kinetic energy into heat 1 , (2) speed sound varies surface with frequency 2,3 and (3) high-frequency waves are strongly attenuated distance in CO 2 (refs. 2–4 ). However, theoretical models were uncertain because a lack experimental data low pressure difficulty to...
Abstract Perseverance explored two geological units on the floor of Jezero Crater over first 420 Martian days Mars2020 mission. These units, Máaz and Séítah formations, are interpreted to be igneous in origin, with traces alteration. We report detection carbonate phases along rover traverse based laser‐induced breakdown spectroscopy (LIBS), infrared reflectance (IRS), time‐resolved Raman (TRR) by SuperCam instrument. Carbonates identified through direct vibrational modes CO 3 functional...
Abstract Séítah is the stratigraphically lowest formation visited by Perseverance in Jezero crater floor. We present data obtained SuperCam: texture imagery, chemistry Laser‐Induced Breakdown Spectroscopy, and mineralogy Supercam Visible Infrared reflectance Raman spectroscopy. The consists of igneous, weakly altered rocks dominated millimeter‐sized grains olivine with presence low‐Ca high‐Ca pyroxenes, other primary minerals (e.g., plagioclase, Cr‐Fe‐Ti oxides, phosphates). Along a ∼140 m...