Search Publications
Analysis of faults and pit chains in Noctis Labyrinthus: Implications for early extension and possible magmatic plumbing
Sefton-Nash, Elliot; De Marchi, Guido; D'Incecco, Piero +10 more
Noctis Labyrinthus has been a region of disputed origin due to its complexity and poor understanding of how various processes and mechanisms may have combined to form it. The surface is an integrated record of intensive tectonic activity expressed by a multiple extended sets of dip-slip faults oriented in different directions, and thought to have …
Water ice concentration and distribution in the Martian south polar layered deposits constrained by the lateral variations of their bulk density
Mitri, Giuseppe; Genova, Antonio; Sulcanese, Davide +4 more
Records of Mars' climate history have been preserved by the ice-rich south polar layered deposits. An accurate knowledge of their properties is key to understanding the evolution of Mars. The combination of geophysical measurements, including gravity, altimetry and radar sounding, enables constraints on the density and composition of the south pol…
Distribution of atmospheric aerosols during the 2007 Mars dust storm (MY 28): Solar infrared occultation observations by SPICAM
Montmessin, F.; Bertaux, J. -L.; Fedorova, A. A. +3 more
Solar occultation measurements by the SPICAM IR on Mars-Express have been used to study aerosol vertical distribution during the 2007 global dust storm (GDS) of Mars Year 28. Measurements in the near-IR spectral range from 1 to 1.7 µm provide information about aerosol optical properties, extinction coefficient, particle size and number densi…
Structural control on formation of polygonal rims of impact craters in Thaumasia Minor, Mars
Dasgupta, Dipayan; Kundu, Abhik; Dasgupta, Nilanjan +3 more
It has been known for almost a century that the surfaces of rocky planets contain polygonal-shaped, circular, or elliptical craters. Researchers have hypothesized that pre-existing structurally weak planes, such as faults or fractures, in the vicinity of the impact, are responsible for polygonal patterns of the crater rims. Thaumasia Minor, Mars, …
A global map of gullied hillslopes on Mars
Conway, S. J.; Noblet, A.; Osinski, G. R.
The distribution of gullies on Mars has been used to support different modes of formation involving CO2, H2O or entirely dry processes. We mapped the extent of gullied hillslope using a global mosaic of ConTeXt camera (CTX) at 6 m/pixel and High Resolution Imaging Science Experiment (HiRISE) browse products at ∼3 m/pixel. Our…
Seasonal low albedo streaks at the edge of the Martian south polar layered deposits
Lucchetti, Alice; Pajola, Maurizio; Cremonese, Gabriele +6 more
Low Albedo Streaks (LAS) are narrow dark streaks observed at the edges of the South Polar Layered Deposits (SPLD) on Mars. We investigate the seasonal morphology, surface topography of LAS-rich areas using monochrome and multiband images from both the High Resolution Imaging Science Experiment (HiRISE) and the Color and Stereo Surface Imaging Syst…
Common origin of trapped volatiles in oxidized icy moons and comets
Johnson, Robert E.; Oza, Apurva V.
Following spacecraft encounters with comets 67P/C-G and 1P/Halley, it was surprising that O2, expected to be a very minor species in their comas, was observed to outgas at a few percent abundance during their ice sublimation phases. This challenged the direct connection suggested between comets and material in the interstellar medium (I…
Unambiguous detection of mesospheric CO2 clouds on Mars using 2.7 µm absorption band from the ACS/TGO solar occultations
Grigoriev, A.; Montmessin, F.; Fedorova, A. +5 more
Mesospheric CO2 clouds are one of two types of carbon dioxide clouds known on Mars. We present observations of mesospheric CO2 clouds made by Atmospheric Chemistry Suite (ACS) onboard the ESA-Roscosmos ExoMars Trace Gas Orbiter (TGO). We analyzed 1663 solar occultation sessions of Thermal InfraRed (TIRVIM) and Middle InfraRed…