High-temperature shock formation of N2 and organics on primordial Titan

Details High-temperature shock formation of N2 and organics on primordial Titan High-temperature shock formation of N2 and organics on primordial Titan

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.332..520m&link_type=abstract

Nature (ISSN 0028-0836), vol. 332, April 7, 1988, p. 520-522.

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43

High Temperature Environments, Nitrogen, Planetary Evolution, Satellite Atmospheres, Titan, Ammonia, High Power Lasers, Hydrocyanic Acid, Hypervelocity Impact, Methane, Saturn, Satellites, Titan, Temperature, Shock Effects, Nitrogen, Origin, Formation, Organic Material, Atmosphere, Ammonia, Impacts, Simulations, Hydrocarbons, Production Rates, Laboratory Studies, Theoretical Studies, Experiments, Comparisons, Abundance, Concentration, Time Scale

Scientific paper

Theoretical models suggest that the initial form of nitrogen in Titan's atmosphere may have been NH3. The possible importance of strong shocks produced during high-velocity impacts accompanying the late stages of accretion are investigated as a method for converting NH3 to N2, of which Titan's atmosphere is now primarily composed. The focused beam of a high-power laser is used to simulate the effects of an impact in Titan's atmosphere. For mixtures of 10, 50, and 90 percent NH3, yields of 0.25, 1, and 6 x 20 to the 17th molecules of N2 per joule, respectively, were obtained. It is also found that the yield of HCN is comparable to that for N2. Several other hydrocarbons are produced, many with yields in excess of theoretical high-temperature-equilibrium models. The above yields, when combined with models of the satellite's accretion, result in a total N2 production comparable to that present in TItan's atmosphere and putative ocean.

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