A study of ethane on Saturn in the 3 micron region

Astronomy and Astrophysics – Astronomy

Scientific paper

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Abundance, Ethane, Infrared Astronomy, Planetary Composition, Saturn Atmosphere, Atmospheric Models, Atmospheric Temperature, Infrared Spectra, Line Spectra, Photochemical Reactions, Saturn, Ethane, Absorption, Infrared, Spectrum, Mixing, Production Rate, Abundance, Models, Photolysis, Stratosphere, Gases, Hydrocarbons, Flux, Wavelengths, Temperatures, Distribution, Photochemistry, Analysis, Data, Eddy Diffusion, Observations, Dissociation, Comparisons, Density

Scientific paper

C2H6 has been detected in absorption on Saturn from 3-micron airborne spectra. Based on comparisons with laboratory spectra of C2H6, the ethane abundance has been estimated at 7.5 plus or minus 3.5 cm-amagat, equivalent to a column abundance of 3.0 plus or minus 1.4 cm-amagat. The results support expectations that CH4 photolysis is a major disequilibrating mechanism in the upper atmosphere of the outer planets and Titan.

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