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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 3 CONTRIBUTI IN ATTI DI CONVEGNO (Proceedings)
  4. 3.02 Abstract in Atti di convegno
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/25093
Title: Thermal stability of water ice in Ceres' crater Oxo
Authors: FORMISANO, Michelangelo 
Federico, Costanzo
DE SANCTIS, MARIA CRISTINA 
FRIGERI, ALESSANDRO 
Magni, Gianfranco
TOSI, Federico 
Issue Date: 2016
Volume: Division for Planetary Sciences Abstracts Book
First Page: 506.06
Abstract: Dwarf planet Ceres, target of the NASA Dawn mission, exhibits evidences of ammoniated phyllosilicates on its surface [1], compatible with a likely outer Solar System origin. Considerable amounts of water ice have recently been detected in some craters by the Visible InfraRed mapping spectrometer (VIR) onboard Dawn in some small fresh crater, such as Oxo, located at about 40° N. The exposure mechanism of water ice is unknown: cryovolcanism, cometary type sublimation/recondensation [2]or impacts with other bodies are likely mechanisms. The evaluation of the time stability of the water ice is crucial to understand the plausible mechanism for its existence. For this purpose, we developed a 3D finite-elements model (FEM) by using the topography given by the shape model of Ceres derived on the basis of images acquired by the Framing Camera in the Survey mission phase. The illumination conditions are provided by the SPICE toolkit. We performed several simulations by analyzing the effect of thermal inertia and albedo on the temperature and rate of ice sublimation. The results of the simulations about the stability of water ice will be presented.[1] De Sanctis et al. NATURE, doi:10.1038/nature16172[2] Formisano et al. MNRAS, doi: 10.1093/mnras/stv2344
Conference Name: 48th DPS Annual Meeting for Division for Planetary Sciences
Conference Place: Pasadena, CA, USA
Conference Date: 16-21 October, 2016
URI: http://hdl.handle.net/20.500.12386/25093
URL: https://aas.org/meetings/dps48
Bibcode ADS: 2016DPS....4850606F
Fulltext: open
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