Search Publications
The lens feature on the inner saturnian satellites
Krupp, N.; Roussos, E.; Hendrix, A. R. +12 more
We have modeled an electron precipitation pattern expected on Mimas, Tethys, and Dione, using two different approaches. In the first approach, we adapt a previously developed model to compute an integrated energy flux into the surfaces of Mimas, Tethys, and Dione. This is a guiding-center, bounce-averaged model. In the second approach, we track in…
Non-steady state tidal heating of Enceladus
Kurita, K.; Hussmann, H.; Shoji, D. +1 more
Enceladus is one of the most geologically active bodies in the Solar System. The satellite's diverse surface suggests that Enceladus was subject to past episodic heating. It is largely probable that the activity of Enceladus is not in a steady state. In order to analyze the non-steady state heating, thermal and orbital coupled calculation is neede…
Noncircular features in Saturn's rings I: The edge of the B ring
Nicholson, Philip D.; French, Richard G.; Hedman, Matthew M. +2 more
A comprehensive investigation of all available radio and stellar occultation data for the outer edge of Saturn's B ring, spanning the period 1980-2010, confirms that the m = 2 distortion due to the strong Mimas 2:1 inner Lindblad resonance circulates slowly relative to Mimas in a prograde direction, with a frequency ΩL = 0.1819° d-…
Titan's surface composition and atmospheric transmission with solar occultation measurements by Cassini VIMS
Sotin, Christophe; McCord, Thomas B.; Hayne, Paul O.
Solar occultation measurements by the Cassini Visual and Infrared Mapping Spectrometer (VIMS) reveal the near-infrared transmission of Titan's atmosphere down to an altitude of ∼40 km. By combining these observations with VIMS reflectance measurements of Titan's surface and knowledge of haze and gas opacity profiles from the Huygens probe, we cons…
Mars surface thermal inertia and heterogeneities from OMEGA/MEX
Bibring, J. -P.; Gondet, B.; Langevin, Y. +4 more
The thermophysical structure of the martian surface is the result of various processes that have shaped the martian surface through time. Previous dedicated heliosynchronous measurements of the thermal infrared (IR) flux of the martian surface have revealed the diversity of martian surface thermal properties, as well as its complexity linked to th…
Dielectric measurements and radar attenuation estimation of ice/basalt sand mixtures as martian Polar Caps analogues
Lauro, S. E.; Pettinelli, E.; Mattei, E. +3 more
The nature of the materials underlying the superficial deposits of Mars can be inferred, applying an inversion algorithm, from the data acquired by the orbiting HF radars MARSIS and SHARAD. This approach requires the knowledge of the electromagnetic properties of the shallow deposits and an accurate evaluation of the signal attenuation. The presen…
Titan dune heights retrieval by using Cassini Radar Altimeter
Seu, R.; Poggiali, V.; Mastrogiuseppe, M. +2 more
The Cassini Radar is a Ku band multimode instrument capable of providing topographic and mapping information. During several of the 93 Titan fly-bys performed by Cassini, the radar collected a large amount of data observing many dune fields in multiple modes such as SAR, Altimeter, Scatterometer and Radiometer. Understanding dune characteristics, …
The effect of solar flares, coronal mass ejections, and solar wind streams on Venus’ 5577 Å oxygen green line
Molaverdikhani, K.; Chanover, N. J.; Slanger, T. G. +1 more
We observed the Venusian 5577.3 Å OI (1S-1D) (oxygen green line) nightglow emission feature after solar flares, coronal mass ejections (CMEs), and solar wind streams from December 2010 to July 2012 using the high resolution Astrophysical Research Consortium Echelle Spectrograph on the Apache Point Observatory 3.5 m telescope.…
Subsidence-induced methane clouds in Titan's winter polar stratosphere and upper troposphere
Barnes, J. W.; Flasar, F. M.; Achterberg, R. K. +2 more
Titan's atmospheric methane most likely originates from lakes at the surface and subsurface reservoirs. Accordingly, it has been commonly assumed that Titan's tropopause region, where the vertical temperature profile is a minimum, acts as a cold trap for convecting methane, leading to the expectation that the formation of methane clouds in Titan's…
Linelist of HD16O for study of atmosphere of terrestrial planets (Earth, Venus and Mars)
Fedorova, A. A.; Lavrentieva, N. N.; Voronin, B. A. +2 more
Studies of water vapor in the atmospheres of Venus, Mars and Earth by spectroscopic techniques are being made routinely with different instruments on board of interplanetary missions like Mars-Express, Venus-Express and many others as well as with a lot of spacecrafts on the Earth’ orbit. Accessibility of detailed spectroscopic information in a wi…