Molecular escape of H2 from Titan's atmosphere: kinetic Monte Carlo simulations

Computer Science

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A molecular model of H2 diffusion through a static background gas of N2 and CH4 in Titan's upper atmosphere and subsequent escape is compared to Cassini density measurements and continuum model results. Normalizing the densities and temperatures at the lower boundary of the simulation region (ro = 3685 km, To ~ 132 K & To ~161 K) to recent INMS data [3] we found that the increase in the N2 densities measured when Titan is in Saturn's plasma sheet results in a decrease in the H2 densities above the exobase and a 10% decrease in the escape rate compared to simulations using N2 densities measured when Titan is outside the plasma sheet.

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