Cassini-Huygens mission : which tholins for simulating Titan's aerosols ?

Jean-Michel Bernard; Eric Quirico; Gilles Montagnac; Bruno Reynard; S. Derenne; P. Coll; M.-J. Nguyen; Cyril Szopa; Guy Cernogora; P. Mc Millan; Jean-Noel Rouzaud; Bernard Schmitt

Conference papers

Cassini-Huygens mission : which tholins for simulating Titan's aerosols ?

Jean-Michel Bernard ¹ Eric Quirico ¹ Gilles Montagnac ² Bruno Reynard ² S. Derenne ³ P. Coll ⁴ M.-J. Nguyen ⁴ Cyril Szopa ⁵ Guy Cernogora ⁵ P. Mc Millan ⁶ Jean-Noel Rouzaud ⁷ Bernard Schmitt ¹

1 LPG - Laboratoire de Planétologie de Grenoble

2 LST - Laboratoire de Sciences de la Terre

3 Bioemco - Biogéochimie et écologie des milieux continentaux

4 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques

5 SA - Service d'aéronomie

6 Department of Chemistry [UCL, London]

7 LGENS - Laboratoire de géologie de l'ENS

Abstract : The exploration of Titan by the CASSINI-HUYGENS mission includes different spectrometers covering the visible and infrared ranges, which will probe the atmosphere (e.g. CIRS, DISR) and the surface (DISR). The analysis of these spectroscopic data requires the optical constant of analogue materials of Titan's aerosols. Titan's tholins, produced in laboratory from N2:CH4 mixtures in cold plasma, are considered as the best analogues available to date. However, large compositional and morphological variations are reported among tholins produced from different experiments, and even within the same experiment. Different attempts have been made in order to better constrain the factors controlling tholin's composition, but no systematic studies have been performed for determining the links between the spectroscopic properties and the chemical composition. This study focuses on the chemical characterization of tholins at the micrometric scale, by using different analytical techniques, and attempts to correlate the chemical information wih the infrared spectral properties.

Document type :

Conference papers

Domain :

Sciences of the Universe [physics]

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https://hal-insu.archives-ouvertes.fr/insu-00364661
Contributor : Béatrice Pibaret-Bourdon Connect in order to contact the contributor
Submitted on : Thursday, February 26, 2009 - 5:08:54 PM
Last modification on : Wednesday, November 17, 2021 - 12:31:17 PM

Cassini-Huygens mission : which tholins for simulating Titan's aerosols ?

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