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Record 2 of 79
Surface Water-Ice Deposits in the Northern Shadowed Regions of Ceres
External Online Source: doi:10.1038/s41550-016-0007
Author and Affiliation:
Platz, T.(Max-Planck Inst. for Solar System Research, Germany)
Nathues, A.(Max-Planck Inst. for Solar System Research, Germany)
Schorghofer, N.(Hawaii Univ., Honolulu, HI, United States)
Preusker, F.(Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Berlin, Germany)
Mazarico, E.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Schroeder, S. E.(Deutsches Zentrum fuer Luft- und Raumfahrt e.V., Berlin, Germany)
Byrne, S.(Arizona Univ., Tucson, AZ, United States)
Kneissl, T.(Freie Univ., Berlin, Germany)
Schmedemann, N.(Freie Univ., Berlin, Germany)
Combe, J.-P.(Bear Fight Inst., Inc., Winthrop, WA, United States) Show more authors
Abstract: Ceres, a dwarf planet located in the main asteroid belt, has a low bulk density, and models predict that a substantial amount of water ice is present in its mantle and outer shell. The Herschel telescope and the Dawn spacecraft have observed the release of water vapor from Ceres, and exposed water ice has been detected by Dawn on its surface at mid-latitudes. Water molecules from endogenic and exogenic sources can also be cold-trapped in permanent shadows at high latitudes, as happens on the Moon and Mercury. Here we present the first image-based survey of Ceres's northern permanent shadows and report the discovery of bright deposits in cold traps. We identify a minimum of 634 permanently shadowed craters. Bright deposits are detected on the floors of just 10 of these craters in multiscattered light. We spectroscopically identify one of the bright deposits as water ice. This detection strengthens the evidence that permanently shadowed areas have preserved water ice on airless planetary bodies.
Publication Date: Dec 15, 2016
Document ID:
(Acquired Jan 20, 2017)
Subject Category: ASTRONOMY
Report/Patent Number: GSFC-E-DAA-TN38267
Document Type: Journal Article
Publication Information: Nature Astronomy Letters; p. 1-6; (e-ISSN 2397-3366); Volume 1; No. 0007
Publisher Information: Nature Publishing Group
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
Other Descriptors: CERES; SURFACE WATER; ICE
Availability Source: Other Sources
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