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Light-toned deposit in the northeastern Hellas basin formed by terrain-conforming airfall sedimentation
Wilson, S. A.; Howard, A. D.; Morgan, A. M. +2 more
Extensive exposures of a light-toned deposit (LTD) occurs on the northeastern interior slope of the Hellas basin. This deposit is on the floors of all but the youngest craters greater than 30 km in diameter in the study region centered at 83°E and 30°S, as well as in exposures on crater interior and exterior walls, on intercrater plains, and the n…
Water production rates from SOHO/SWAN observations of six comets: 2017-2020
Bertaux, J. -L.; Combi, M. R.; Shou, Y. +4 more
The Solar Wind ANisotropies (SWAN) all-sky hydrogen Lyman-alpha camera on the SOlar and Heliosphere Observer (SOHO) satellite makes daily images of the entire sky to monitor the three-dimensional distribution of solar wind and solar radiation via its imprint on the stream of interstellar hydrogen that flows through the solar system. In the process…
The Faraday rotation effect in Saturn Kilometric Radiation observed by the CASSINI spacecraft
Lamy, Laurent; Fischer, Georg; Kurth, William S. +7 more
Non-thermal radio emissions from Saturn, known as Saturn Kilometric Radiation (SKR), are analyzed for the Faraday rotation effect detected in Cassini RPWS High Frequency Receiver (HFR) observations. This phenomenon, which mainly affects the lower-frequency part of SKR below 200 kHz, is characterized by a rotation of the semi-major axis of the SKR …
Revisiting magnetospheric CAPS TOF data post Cassini
Wilson, R. J.; Reisenfeld, D. B.; Allen, R. C. +2 more
The Cassini Plasma Spectrometer has a Time-of-Flight sensor capable of separating out the major magnetospheric ions at Saturn of protons, ions with a mass to charge of 2 amu/q, and water group ions (O+, OH+, H2O+ and H3O+), yet until this study a survey of their relative proportions…
Corrigendum to "Photometrically-corrected global infrared mosaics of Enceladus: New implications for its spectral diversity and geological activity" [Icarus 349 (2020) 113848]
Le Mouélic, S.; Rodriguez, S.; Sotin, C. +4 more
The authors regret that the longitude grid in Figures. 9 and 11 was wrongly shifted by 180° in the original manuscript. We provide below the correct versions of Figures. 9 and 11.
Extensive glaciation in the Erebus Montes region of Mars
Sinha, Rishitosh K.; Ray, Dwijesh
Lobate debris apron (LDA) in the Mars' mid-latitudes substantiate extensive glaciation during the Late Amazonian. Detailed investigation of these landforms is imperative because different areas distributed at different latitudes, distinct geologic settings and varied regional topography may have responded to climate in different ways. In this stud…
Chrono-morphologic surface- a parameter to quantify craters' heterogeneity and its applicability on Mars
Căpitan, Radu Dan
On any solid planetary surface, crater populations in any given region show variations in their geomorphology related to their initial formation conditions and to their post-formation modifications. This ubiqutous and random distribution of craters in time and space defines a universal cratering characteristic- the craters heterogeneity, that is p…
Introduction to Icarus special issue "From Mars Express to ExoMars"
Lopez-Valverde, Miguel A.; Titov, Dmitrij V.; Wilson, Colin F.
In February 2018, the international community working on the investigation and exploration of the atmosphere and surface of Mars met at ESAC near Madrid for a few days conference, organized and funded by the project UPWARDS ("Understanding Planet Mars With Advanced Remote- ensing Datasets and Synergistic Studies", www.upwards-mars.eu) of the EU Ho…
Simulating re-impacts from craters at the deepest location of Phobos to generate its blue spectral units
Kikuchi, Hiroshi
The spatial distribution pattern of ejecta from an impact crater on the surface of a body in space holds clues to understanding the ejecta launch conditions, the crater excavation process, and the dynamical environment. In particular, focusing on re-impact sites from larger or deeper craters on the surface is important, as they tend to preserve mu…
Unveiled density wave in Saturn's rings
French, Richard G.; McGhee-French, Colleen A.; Rappaport, Nicole J. +1 more
We unveil a two-dimensional visualization of the Mimas 5:3 density wave in Saturn's rings, created directly from 31 radial optical depth profiles of the rings obtained between 2005 and 2008 from Cassini Radio Science Subsystem (RSS) occultation observations, assuming only its predicted pattern speed and taking advantage of its evident four-armed s…