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Vertical distribution of cyclopropenylidene and propadiene in the atmosphere of Titan

Willacy, Karen and Chen, SiHe and Adams, Danica J. and Yung, Yuk L. (2022) Vertical distribution of cyclopropenylidene and propadiene in the atmosphere of Titan. . (Unpublished)

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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 C₃ molecules: C₃H₆, CH₂CCH₂, c-C₃H₂, and (b) retrieval of C₆H₆, which is formed primarily via C₃ chemistry, from Cassini-UVIS data. The detection of c-C₃H₂ 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-C₃H₂ above 1000 km.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Willacy, Karen0000-0001-6124-5974
Adams, Danica J.0000-0001-9897-9680
Yung, Yuk L.0000-0002-4263-2562
Additional Information:© 2022. Attribution 4.0 International (CC BY 4.0). The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). It was supported by the NASA Astrobiology Institute. We thank Run-Lie Shia for help with modifying the KINETICS code used in our calculations.
Group:Division of Geological and Planetary Sciences
Funding AgencyGrant Number
Subject Keywords:Titan, photochemistry, Atmosphere: composition, Atmospheres: chemistry
Record Number:CaltechAUTHORS:20220524-180244525
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114890
Deposited By: George Porter
Deposited On:31 May 2022 17:55
Last Modified:02 Jun 2023 01:25

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