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Equatorial belt of Titan: Aaru region as seen by VIMS/Cassini

Brossier, Jérémy F. and Rodriguez, S. and Maltagliati, L. and Le Mouelic, S. and Solomonidou, A. and Coustenis, A. and Hirtzig, M. and Jaumann, R. and Brown, Robert H. (2016) Equatorial belt of Titan: Aaru region as seen by VIMS/Cassini. 48th Division for Planetary Sciences (DPS)/ 11th European Planetary Science Congress (EPSC), 16-21 Oct 2016, Pasadena, California (US).

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Abstract

Since eleven years of observation, near-infrared imaging data from Visual and Infrared Mapping Spectrometer (VIMS) onboard Cassini reveal a variety of surface units that are compositionally and structurally distinct. The analysis of these units enables constraining the surface composition of Titan, which is of prime importance for modeling Titan’s interior, surface, and atmosphere, particularly in the search for an endogenic methane source. For this study, we investigate a selection of units of interest seen in VIMS data by comparatively applying an empirical correction and a radiative transfer code in order to correct for atmospheric contributions and retrieve surface albedo. SAR swaths from the Radar instrument were also used for geomorphological mapping purposes. We focus on the region of Aaru, located in the equatorial belt and centered at 10˚N and 340˚W, where several geological features are have been identified: (1) infrared-brown dunes material; (2) a strongly eroded impact crater named Paxsi; (3) mountainous and infrared-bright terrains; and (4) infrared-blue areas devoid of dunes (similar to those seen in other regions probably enriched in water-ice, such as Chusuk Planitia). By using our radiative transfer model, we estimate the surface albedo of regions of our interest within different infrared units of the Aaru region and compare with spectra of surface candidates, starting with water-ice and tholins. As seen in the similar study over Sinlap crater and its surroundings, this method of analysis allows understanding of the compositional and structural relations between the different spectral units.

Item URL in elib:https://elib.dlr.de/105102/
Document Type:Conference or Workshop Item (Lecture, Poster)
Title:Equatorial belt of Titan: Aaru region as seen by VIMS/Cassini
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Brossier, Jérémy F.Jeremy.Brossier (at) dlr.deUNSPECIFIED
Rodriguez, S.Laboratoire AIM, FranceUNSPECIFIED
Maltagliati, L.Laboratoire AIM, Université Paris Diderot, ParisUNSPECIFIED
Le Mouelic, S.Laboratoire de Planétologie et Géodynamique, 2 rue de la Houssinière, 44322 NantesUNSPECIFIED
Solomonidou, A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USAUNSPECIFIED
Coustenis, A.Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris-Meudon, 92195 Meudon Cedex, FranceUNSPECIFIED
Hirtzig, M.Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris-Meudon, 92195 Meudon Cedex, FranceUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Brown, Robert H.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAUNSPECIFIED
Date:October 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Titan, Surface composition, Radiative transfer model, Spectroscopy
Event Title:48th Division for Planetary Sciences (DPS)/ 11th European Planetary Science Congress (EPSC)
Event Location:Pasadena, California (US)
Event Type:international Conference
Event Dates:16-21 Oct 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben CASSINI (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Brossier, Jérémy F.
Deposited On:21 Oct 2016 08:09
Last Modified:21 Oct 2016 08:09

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