Surface albedo spectral properties of geologically interesting areas on Titan - Université Paris Cité Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research. Planets Année : 2014

Surface albedo spectral properties of geologically interesting areas on Titan

K. Stephan
  • Fonction : Auteur
R. Jaumann
  • Fonction : Auteur
K. Kyriakopoulos
  • Fonction : Auteur
K. Stamatelopoulou-Seymour
  • Fonction : Auteur

Résumé

We investigate the nature and possible formation processes of three areas on Titan's surface which have been suggested as geologically interesting: Hotei Regio, Tui Regio, and Sotra Patera. We also reanalyze the spectral characteristics of the Huygens Landing Site. We apply a statistical Principal Component Analysis (PCA) and a radiative transfer (RT) method on the Visual and Infrared Mapping Spectrometer Datacubes in order to retrieve the surface albedo of distinct spectral units in the near infrared. We have been able to exploit only a subset of the currently available Hotei Regio data, which are, in general, not optimal in terms of geometry for an analysis with a plane-parallel RT code. Our inferred surface albedos present generally higher values from 1 to 2 μm and lower ones at 0.94 and in the 2.6-5 μm region. The Regions of Interest (RoIs) within Hotei Regio, Tui Regio, and Sotra Patera are always significantly brighter than the surrounding areas. The largest variations are found longward of 2 μm and mainly at 5 μm. This higher surface albedo with respect to the surrounding area and, in general, the fact that the spectral behavior is different for each of these areas, is probably indicative of diverse chemical compositions and origins. We compare the spectral albedos with some suggested surface candidates on Titan (such as H 2 O, CO 2 , and CH 4 ices, as well as tholin) and discuss possible chemical composition variations as well as other interpretations.
Fichier principal
Vignette du fichier
JGR Planets - 2014 - Solomonidou - Surface albedo spectral properties of geologically interesting areas on Titan.pdf (4.13 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-02544482 , version 1 (02-01-2022)

Licence

Copyright (Tous droits réservés)

Identifiants

Citer

A. Solomonidou, M. Hirtzig, A. Coustenis, E. Bratsolis, S. Le Mouélic, et al.. Surface albedo spectral properties of geologically interesting areas on Titan. Journal of Geophysical Research. Planets, 2014, 119 (8), pp.1729-1747. ⟨10.1002/2014JE004634⟩. ⟨hal-02544482⟩
226 Consultations
70 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More