The photochemical model of Titan's atmosphere and ionosphere: a version without hydrodynamic escape

Computer Science

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Scientific paper

There are strong observational and theoretical evidences both in favor and against hydrodynamic escape on Titan, and the problem remains unsolved. Hydrodynamic escape significantly affects the structure and composition of the atmosphere and its evolution. Hydrocarbon, nitrile, and ion chemistries are strongly coupled on Titan, and attempts to calculate them separately may result in significant error. Here we apply our photochemical model of Titan's atmosphere and ionosphere to the case of no hydrodynamic escape. Our model is still the only after-Cassini self consistent model of coupled neutral and ion chemistry, the lack of hydrodynamic escape is a distinct possibility, and the suggested version of the model is of practical interest. The model results are briefly discussed and compared with those for hydrodynamic escape. Losses of methane and nitrogen and production and deposition to the surface of hydrocarbons and nitriles are evaluated along with the proper lifetimes and revolutionary aspects.

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