Vertical distribution of cyclopropenylidene and propadiene in the atmosphere of Titan

Karen Willacy; SiHe Chen; Danica J. Adams; Yuk L. Yung

doi:10.3847/1538-4357/ac6b9d

paper

Vertical distribution of cyclopropenylidene and propadiene in the atmosphere of Titan

arXiv:2204.13064 · doi:10.3847/1538-4357/ac6b9d

Abstract

Titan's atmosphere is a natural laboratory for exploring the photochemical synthesis of organic molecules. Significant recent advances in the study of the atmosphere of Titan include: (a) detection of C $_{3}$ molecules: C $_{3}$ H $_{6}$ , CH $_{2}$ CCH $_{2}$ , c-C $_{3}$ H $_{2}$ , and (b) retrieval of C $_{6}$ H $_{6}$ , which is formed primarily via C $_{3}$ chemistry, from Cassini-UVIS data. The detection of $c$ -C $_{3}$ H $_{2}$ is of particular significance since ring molecules are of great astrobiological importance. Using the Caltech/JPL KINETICS code, along with the best available photochemical rate coefficients and parameterized vertical transport, we are able to account for the recent observations. It is significant that ion chemistry, reminiscent of that in the interstellar medium, plays a major role in the production of c-C $_{3}$ H $_{2}$ above 1000 km.

arXiv comment18 pages (+ 27 page appendix), 16 figures

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Cited by in corpus (1)

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