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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/25898
Title: Detection of local H2O exposed at the surface of Ceres
Authors: Combe, Jean-Philippe
McCord, Thomas B.
TOSI, Federico 
AMMANNITO, ELEONORA
CARROZZO, FILIPPO GIACOMO 
DE SANCTIS, MARIA CRISTINA 
RAPONI, Andrea 
Byrne, Shane
Landis, Margaret E.
Hughson, Kynan H. G.
Raymond, Carol A.
Russell, Christopher T.
Issue Date: 2016
Journal: SCIENCE 
Number: 353
Issue: 6303
First Page: aaf3010-1
Abstract: The surface of dwarf planet Ceres contains hydroxyl-rich materials. Theories predict a water ice-rich mantle, and water vapor emissions have been observed, yet no water (H2O) has been previously identified. The Visible and InfraRed (VIR) mapping spectrometer onboard the Dawn spacecraft has now detected water absorption features within a low-illumination, highly reflective zone in Oxo, a 10-kilometer, geologically fresh crater, on five occasions over a period of 1 month. Candidate materials are H2O ice and mineral hydrates. Exposed H2O ice would become optically undetectable within tens of years under current Ceres temperatures; consequently, only a relatively recent exposure or formation of H2O would explain Dawn’s findings. Some mineral hydrates are stable on geological time scales, but their formation would imply extended contact with ice or liquid H2O.
URI: http://hdl.handle.net/20.500.12386/25898
URL: https://science.sciencemag.org/content/353/6303/aaf3010
ISSN: 0036-8075
DOI: 10.1126/science.aaf3010
Bibcode ADS: 2016Sci...353.3010C
Fulltext: reserved
Appears in Collections:1.01 Articoli in rivista

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