Search Publications
Major episodes in the geologic history of western Promethei Terra, Mars
Neukum, G.; Ivanov, M. A.; Korteniemi, J. +3 more
Geologic evolution of the western portion of Promethei Terra (40-50°S, 90-105°E) consists of two major episodes. The first was the formation of a late Noachian-early Hesperian volcanic province. During this episode a kilometer-thick suite (≈0.3 × 106 km3) of lavas accumulated to the south of Reull and Harmakhis Valles within …
Radiative transfer modeling of near-infrared reflectance of lunar highland and mare soils
Cahill, J. T. S.; Lucey, P. G.; Stockstill-Cahill, K. R. +1 more
With near-infrared hyperspectral data sets returned from KAGUYA/SELENE and Chandrayaan-1's Moon Mineralogic Mapper (M3), accurate evaluation and interpretation of lunar data sets with higher spectral resolution has never been more critical. Here we test a new radiative transfer spectral modeling algorithm to determine composition from h…
Martian atmosphere as observed by VIRTIS-M on Rosetta spacecraft
Langevin, Y.; Rauer, H.; Bellucci, G. +46 more
The Rosetta spacecraft accomplished a flyby of Mars on its way to 67P/Churyumov-Gerasimenko on 25 February 2007. In this paper we describe the measurements obtained by the M channel of the Visual and Infrared Thermal Imaging Spectrometer (VIRTIS-M) and the first scientific results derived from their analysis. The broad spectral coverage of the VIR…
Asymmetry in the Jovian auroral Lyman-α line profile due to thermospheric high-speed flow
Chaufray, J. -Y.; Clarke, J. T.; Waite, J. H. +1 more
The presence of a fast wind in the auroral region atmosphere of Jupiter has been detected from the Doppler shift in near-IR observations of H3+ emissions. The Doppler effect also modifies auroral resonance emission line shapes. We present a new radiative transfer equation for the hydrogen Lyman-α line in the presence of a hor…
On the mystery of the perennial carbon dioxide cap at the south pole of Mars
Soto, Alejandro; Richardson, Mark Ian; Guo, Xin +1 more
A perennial ice cap has long been observed near the south pole of Mars. The surface of this cap is predominantly composed of carbon dioxide ice. The retention of a CO2 ice cap results from the surface energy balance of the latent heat, solar radiation, surface emission, subsurface conduction, and atmospheric sensible heat. While models …
Chemical composition of simulated Titan's midatmospheric aerosols
Bar-Nun, A.; Dimitrov, V.; Jacovi, R. +1 more
A large fraction of the major unsaturated species (C2H2 C2H4, HCN, and HC3N) with mixing ratios of about 3 × 10-6, 10-7-10-8, 3 × 10-7, and 10-9-10-10 reside in Titan's atmosphere between 150 and 500 km (Vinatier et al., 2009; C…
Suppression of the Rhines effect and the location of vortices on Saturn
Showman, A. P.; Penny, A. B.; Choi, D. S.
Saturn's atmosphere contains numerous vortices that reside predominantly within specific localized latitude bands. Two-dimensional turbulence theory predicts that vortices which do form are readily destroyed as they interact with dispersive Rossby waves in a process called the “Rhines effect,” which acts to organize turbulent energy into alternati…