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Radiation-induced near-surface atmospheres of Europa and Titan

Murthy S. Gudipati 1 Bryana L. Henderson 1 Benjamin Fleury 2 Nathalie Carrasco 3, 2 Nathalie Rivas 1 Isabelle Couturier-Tamburelli 4 Véronique Vuitton 5
1 JPL - Jet Propulsion Laboratory
2 PLANETO - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
3 IUF - Institut Universitaire de France
4 Spectrométries et Dynamique Moléculaires
PIIM - Physique des interactions ioniques et moléculaires
5 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
Abstract : We will discuss and compare photochemical processes on Europa and Titan, focusing on the near- surface and lower-atmospheric organic composition on both of these moons. Europa's surface receives high doses of radiation that can easily oxidize organics in the presence of water-ice. Titan's atmosphere is depleted of oxygen, but enriched with organic molecules, including condensed aerosols. In this contribution we will focus on photochemistry caused by longer wavelength UV-VIS photons (>250 nm) photons that can pass through Titan’s atmosphere to the haze region (~100 km) and onto the surface of Titan [1, 2] and electron-induced processes of organics on Europa's surface, leading to the formation of Europa's tenuous atmosphere [3-6]. We then compare the role of organics on both of these astrobiologically-important icy bodies in our solar system.
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https://hal-insu.archives-ouvertes.fr/insu-01208355
Contributor : Catherine Cardon <>
Submitted on : Friday, October 2, 2015 - 2:29:59 PM
Last modification on : Wednesday, April 7, 2021 - 8:20:02 PM

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  • HAL Id : insu-01208355, version 1

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Citation

Murthy S. Gudipati, Bryana L. Henderson, Benjamin Fleury, Nathalie Carrasco, Nathalie Rivas, et al.. Radiation-induced near-surface atmospheres of Europa and Titan. European Planetary Science Congress 2015, Sep 2015, Nantes, France. pp.EPSC2015-768-2. ⟨insu-01208355⟩

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