MASTROGIUSEPPE, Marco; POGGIALI, Valerio; HAYES, Alexander; LORENZ, Ralph; LUNINE, Jonathan; PICARDI, Giovanni; SEU, Roberto; FLAMINI, Enrico; MITRI, Giuseppe; NOTARNICOLA, Claudia; PAILLOU, Philippe; ZEBKER, Howard

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MASTROGIUSEPPE, Marco

POGGIALI, Valerio

HAYES, Alexander
Caltech Division of Geological and Planetary Sciences

Idioma

Communication dans un congrès

Este ítem está publicado en

EGU, Vienna, april 2014, 2014, Vienna.

Resumen en inglés

construct the depth profile--the bathymetry--of Titan's large sea Ligeia Mare from Cassini RADAR data collected during the 23 May 2013 (T91) nadir-looking altimetry flyby. We find the greatest depth to be about 160 m and a seabed slope that is gentler toward the northern shore, consistent with previously imaged shoreline morphologies. Low radio signal attenuation through the sea demonstrates that the liquid, for which we determine a loss tangent of 3 ± 1*10-5, is remarkably transparent, requiring a nearly pure methane-ethane composition, and further that microwave absorbing hydrocarbons, nitriles, and suspended particles be limited to less than the order of 0.1% of the liquid volume. Presence of nitrogen in the ethane-methane sea, expected based on its solubility and dominance in the atmosphere, is consistent with the low attenuation, but that of substantial dissolved polar species or suspended scatterers is not.< Leer menos

Palabras clave en inglés

Planetary Sciences

Solar System Objects

Titan

Hydrology

Remote sensing

Cassini

Orígen

Importado de Hal

Centros de investigación

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804