Sébastien Rodriguez

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Titan is the only satellite in our Solar System with a dense atmosphere. The surface pressure is 1.5 bar (ref. 1) and, similar to the Earth, N2 is the main component of the atmosphere. Methane is the second most important component, but it is photodissociated on a timescale of 10(7) years (ref. 3). This short timescale has led to the suggestion that Titan(More)
Clouds on Titan result from the condensation of methane and ethane and, as on other planets, are primarily structured by circulation of the atmosphere. At present, cloud activity mainly occurs in the southern (summer) hemisphere, arising near the pole and at mid-latitudes from cumulus updrafts triggered by surface heating and/or local methane sources, and(More)
Ontario Lacus is the largest lake of the whole southern hemisphere of Titan, Saturn’s major moon. It has been imaged twice by each of the Cassini imaging systems (Imaging Science Subsystem (ISS) in 2004 and 2005, Visual and Infrared Mapping Spectrometer (VIMS) in 2007 and 2009 and RADAR in 2009 and 2010). We compile a geomorphological map and derive a(More)
Inversion-layer mobility has been investigated in extremely thin silicon-on-insulator metal–oxide– semiconductor field-effect transistors with a silicon film thickness as low as 5 nm. The Poisson and Schr!dinger equations have been self-consistently solved to take into account inversion layer quantization. To evaluate the electron mobility, the Boltzmann(More)
Disturbances, such as rainfall and hydrological management of Vouglans reservoir, seem to influence the establishment of the ecological system inside this man-made lake. In this paper, the main effect of these disturbances are changes in the zmix:zeu ratio, with a shift in the composition and phytoplankton dynamics, and consequently in the Shannon's(More)
ONBOARD CASSINI. S. Le Mouélic, P. Rannou, C. Sotin, L. Le Corre, J.W. Barnes, R.H. Brown, K. Baines, B. Buratti, R. Clark, P. Drossart, C. Griffith, M. Hirtzig, P. Nicholson and S. Rodriguez. 1 Laboratoire de Planétologie et Géodynamique, CNRS, UMR6112, université de Nantes, France, 2 Université de Reims, France, 3 JPL, Pasadena, USA, 4 NASA Ames Research(More)
1 Université de Nantes, Laboratoire de Planétologie et Géodynamique, 2 rue Houssinière, 44322 Nantes Cedex 03, France 2 CNRS, UMR-6112, 2 rue Houssiniere, 44322 Nantes Cedex 03, France 3 Observatoire Aquitain des Sciences de l’Univers – UMR 5804, Floirac, France 20 4 Jet Propulsion Laboratory, M/S 183-501, 4800 Oak Grove Drive, Pasadena, CA 91109, USA 5(More)
We report the discovery of organic sedimentary deposits at the bottom of dry lakebeds near Titan’s north pole in observations from the Cassini Visual and Infrared Mapping Spectrometer (VIMS). We show evidence that the deposits are evaporitic, making Titan just the third known planetary body with evaporitic processes after Earth and Mars, and is the first(More)
*Correspondence: jwbarnes@uidaho.edu 1Department of Physics, University of Idaho, Moscow, Idaho 83844-0903, USA Full list of author information is available at the end of the article Abstract Cassini/VIMS high-phase specular observations of Titan’s north pole during the T85 flyby show evidence for isolated patches of rough liquid surface within the(More)
Stephan et al. (Stephan, K. et al. [2010]. Geophys. Res. Lett. 37, 7104–+.) first saw the glint of sunlight specularly reflected off of Titan’s lakes. We develop a quantitative model for analyzing the photometric lightcurve generated during a flyby in which the specularly reflected light flux depends on the fraction of the solar specular footprint that is(More)