A5010094079- Planetary Science and Exploration
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Scientific Computing and Data Management
- Astronomy and Astrophysical Research
- Space Exploration and Technology
- Geophysics and Gravity Measurements
- Space Science and Extraterrestrial Life
- Geology and Paleoclimatology Research
- Meteorological Phenomena and Simulations
- Solar and Space Plasma Dynamics
- Distributed and Parallel Computing Systems
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Research Data Management Practices
- Adaptive optics and wavefront sensing
- Isotope Analysis in Ecology
- Astrophysics and Star Formation Studies
- Seismic Imaging and Inversion Techniques
- Nuclear Materials and Properties
- Computational Physics and Python Applications
- Distributed systems and fault tolerance
- Geological Formations and Processes Exploration
- Spaceflight effects on biology
- Nuclear materials and radiation effects
Dynamic Concepts (United States)
2023
Energy Concepts (United States)
2022
Institut polytechnique de Grenoble
2009
Laboratoire des Matériaux et du Génie Physique
2009
Cornell University
2006-2007
Astronomy and Space
2006
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....
Perseverance's Mastcam-Z instrument provides high-resolution stereo and multispectral images with a unique combination of spatial resolution, coverage, wavelength coverage along the rover's traverse in Jezero crater, Mars. Images reveal rocks consistent an igneous (including volcanic and/or volcaniclastic) impactite origin limited aqueous alteration, including polygonally fractured weathered coatings; massive boulder-forming bedrock consisting mafic silicates, ferric oxides, iron-bearing...
Abstract The first samples collected by the Perseverance rover on Mars 2020 mission were from Maaz formation, a lava plain that covers most of floor Jezero crater. Laboratory analysis these back Earth would provide important constraints petrologic history, aqueous processes, and timing key events in However, interpreting requires detailed understanding emplacement modification history formation. Here we synthesize orbital remote sensing data to link outcrop‐scale interpretations broader...
Abstract NASA's Mars‐2020 Perseverance rover spent its first year in Jezero crater studying the mafic lava flows of Máaz formation and ultramafic cumulates Séítah formation, both which have undergone minor alteration are variably covered by coatings, dust, and/or soil deposits. Documenting rock characteristics across floor is critical for establishing geologic context Perseverance's cached samples—which will eventually be returned to Earth—and interpreting deposition modification formations....
The ultraviolet (UV) emission of stellar flares may have a pivotal role in the habitability rocky exoplanets around low-mass stars. Previous studies used white-light observations to calibrate empirical models which describe optical and UV flare emission. However, accuracy predictions previously not been tested. We combined TESS GALEX test calibrated using rates M find that canonical 9000 K blackbody model by underestimates NUV energies field age stars up factor 6.5$\pm$0.7 FUV fully...
Abstract A multi‐instrument study of the regolith Jezero crater floor units by Perseverance rover has identified three types regolith: fine‐grained, coarse‐grained, and mixed‐type. Mastcam‐Z, Wide Angle Topographic Sensor for Operations eNgineering, SuperCam Remote Micro Imager were used to characterize texture, particle size, roundedness where possible. Mastcam‐Z multispectral laser‐induced breakdown spectroscopy data constrain composition types. Fine‐grained is found surrounding bedrock...
Abstract The Mars Science Laboratory Curiosity rover has explored over 400 m of vertical stratigraphy within Gale crater to date. These fluvio‐deltaic, lacustrine, and aeolian strata have been well‐documented by Curiosity's in situ remote science instruments, including the Mast Camera (Mastcam) pair multispectral imagers. Mastcam visible near‐infrared spectra can broadly distinguish between iron phases oxidation states, combination with chemical data from other help constrain mineralogy,...
Characterizing the distribution of flare properties and occurrence rates is important for understanding habitability M dwarf exoplanets. The GALEX space telescope observed GJ 65 system, composed active, flaring stars BL Cet UV Cet, 15900 seconds (~4.4 hours) in two ultraviolet bands. contrast flux between flares photospheres cool maximized at wavelengths, brightest nearest system with significant coverage. It therefore represents best opportunity to measure low energy GALEX. We construct...
Abstract We have performed the first systematic search of full Galaxy Evolution Explorer (GALEX) data archive for astrophysical variability on timescales seconds to minutes by rebinning across whole mission 30 s time resolution. The result is GALEX Flare Catalog (GFCAT), which describes 1426 ultraviolet variable sources, including stellar flares, eclipsing binaries, δ Scuti and RR Lyrae variables, active galactic nuclei. Many these sources never previously been identified as variable. also...
The first samples collected by the Perseverance rover on Mars 2020 mission were from Maaz formation, a lava plain that covers most of floor Jezero crater. Laboratory analysis these back Earth will provide important constraints petrologic history, aqueous processes, and timing key events in Jezero. However, interpreting require detailed understanding emplacement modification history formation. Here we synthesize orbital remote sensing data to link outcrop-scale interpretations broader crater,...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Planets. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Spectral diversity rocks soils in Mastcam observations along Curiosity rover’s traverse Gale crater,...
We propose a suite of telescopes be deployed as part the Artemis III human-crewed expedition to lunar south pole, able collect wide-field simultaneous far-ultraviolet (UV), near-UV, and optical band images with fast cadence (10 seconds) single sky for several hours continuously. Wide-field, high-cadence monitoring in regime has provided new scientific breakthroughs fields exoplanets, stellar astrophysics, astronomical transients. Similar observations cannot made UV from within Earth's...
We have performed the first systematic search of full GALEX data archive for astrophysical variability on timescales seconds to minutes by rebinning across whole mission 30-second time resolution. The result is Flare Catalog (GFCAT) which describes 1426 ultraviolet variable sources, including stellar flares, eclipsing binaries, $\delta$ Scuti and RR Lyrae variables, Active Galactic Nuclei (AGN). Many these sources never previously been identified as variable. also assembled a table...