Search Publications
Venus upper atmosphere revealed by a GCM: II. Model validation with temperature and density measurements
Lefèvre, Franck; Lebonnois, Sebastien; Schubert, Gerald +5 more
An improved high resolution (96 longitude by 96 latitude points) ground-to-thermosphere version of the Institut Pierre-Simon Laplace (IPSL) Venus General Circulation Model (VGCM), including non-orographic gravity waves (GW) parameterization and fine-tuned non-LTE parameters, is presented here. We focus on the validation of the model built from a c…
The climatology of carbon monoxide on Mars as observed by NOMAD nadir-geometry observations
Vandaele, Ann Carine; Liuzzi, Giuliano; Daerden, Frank +10 more
More than a full Martian year of observations have now been made by the Nadir Occultation for MArs Discovery (NOMAD) instrument suite on-board the ExoMars Trace Gas Orbiter. Radiative transfer modeling of NOMAD observations taken in the nadir geometry enable the seasonal and global-scale variations of carbon monoxide gas in the Martian atmosphere …
NEOExchange - an online portal for NEO and Solar System science
Lister, T. A.; Gomez, E.; Chatelain, J. +4 more
Las Cumbres Observatory (LCO) has deployed a homogeneous telescope network of ten 1-m telescopes to four locations in the northern and southern hemispheres, with a planned network size of twelve 1-m telescopes at 6 locations. This network is very versatile and is designed to respond rapidly to target of opportunity events and also to perform long …
Retrieval of the water ice column and physical properties of water-ice clouds in the martian atmosphere using the OMEGA imaging spectrometer
Bellucci, G.; Forget, F.; Oliva, F. +8 more
Using spectral images recorded by the OMEGA instrument on Mars Express (Observatoire pour la Minéralogie, l'Eau, les Glaces et l'Activité), we are able to derive physical properties of aerosols in water-ice clouds on Mars for a distribution of pixels over an observed cloud formation. These properties, mean effective radius, reff, and op…
Mid-infrared reflectance spectroscopy of synthetic glass analogs for Mercury surface studies
Helbert, Joern; Hiesinger, Harald; Weber, Iris +14 more
We have synthesized and analyzed by mid-infrared reflectance spectroscopy silicate glasses that are representative for the glasses on the surface of Mercury. The glass compositions are based on high-pressure laboratory experiments and the resulting compositions of the glass phase. The spectra are of interest for investigating the surface of Mercur…
Local topography effects on the surface temperatures on Mars - Application to the case of Recurring Slope Lineae (RSL)
Quantin-Nataf, Cathy; Leyrat, Cédric; Millot, Cédric +1 more
Recurring Slope Lineae (RSL) are dark linear recurrent features which incrementally lengthen and fade each year on Martian slopes. Their activity during warmest seasons rises the question of modern martian water related process. To investigate this question, this study focuses on the thermal context of slopes hosting RSL. The paper presents a nume…
The Eris/Dysnomia system I: The orbit of Dysnomia
Buie, M. W.; Grundy, W. M.; Holler, B. J. +1 more
We present new results on the Eris/Dysnomia system including analysis of new images from the WFC3 instrument on the Hubble Space Telescope (HST). Seven HST orbits were awarded to program 15171 in January and February 2018, with the intervals between observations selected to sample Dysnomia over a full orbital period. Using relative astrometry of E…
Spectrophotometric properties of materials observed by Pancam on the Mars Exploration Rovers: 4. Final mission observations
Johnson, Jeffrey R.; Grundy, William M.; Lemmon, Mark T. +4 more
The last sets of Panoramic Camera (Pancam) visible/near-infrared (432-1009 nm) multispectral observations made under varying viewing and illumination geometries by the Mars Exploration Rovers Spirit and Opportunity were examined using radiative transfer models to study the surface scattering and microphysical nature of rock and soil units at both …
Ice-rich landforms of the southern mid-latitudes of Mars: A case study in Nereidum Montes
Crown, David A.; Berman, Daniel C.; Smith, Isaac B. +1 more
Mapping of Viscous Flow Features (VFFs), a general grouping of ice-rich flow features that includes Lobate Debris Aprons (LDA), Concentric Crater Fill (CCF), Lineated Valley Flow (LVF), small lobate flows (i.e., glacier-like flows, or GLFs), and arcuate ridges, in the southern hemisphere of Mars shows a dense concentration in Nereidum Montes, alon…
Evidence of mud volcanism due to the rapid compaction of Martian tsunami deposits in southeastern Acidalia Planitia, Mars
Costard, François; Séjourné, Antoine; Di Pietro, Ilaria +2 more
Thumbprint terrain was first recognized in Viking Orbiter data and described as sets of alternating continuous parallel ridges and depressions up to several tens of kilometres in length, with high and low albedo respectively. We performed a geomorphological analysis of these features using both Context Camera and High Resolution Imaging Science Ex…