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Exposed H2O-rich areas detected on Ceres with the dawn visible and infrared mapping spectrometer

Combe, J.-P. and Raponi, A and Tosi, F. and De Sanctis, M.C. and Carrozzo, F. G. and Zambon, F. and Ammannito, E. and Hughson, K. and Nathues, A. and Hoffmann, M. and Platz, Thomas and Thangjam, G. S. and Schorghofer, Norbert and Schröder, Stefan and Byrne, Shane and Landis, M. E. and Ruesch, Ottaviano and McCord, Thomas B. and Johnson, Katherine and Singh, Sandeep and Raymond, C.A. and Russell, C.T. (2019) Exposed H2O-rich areas detected on Ceres with the dawn visible and infrared mapping spectrometer. Icarus, 318, pp. 22-41. Elsevier. DOI: 10.1016/j.icarus.2017.12.008 ISSN 0019-1035

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Official URL: http://dx.doi.org/10.1016/j.icarus.2017.12.008

Abstract

H2O-rich materials are locally exposed at the surface of Ceres as discovered from infrared reflectance spectra of the Visible and InfraRed mapping spectrometer (VIR) of the Dawn mission. Nine locations on Ceres exhibit diagnostic absorption bands of the H2O molecule at 2.00, 1.65 and 1.28 µm. The detections are all consistent with H2O ice mixed with low-albedo components. All the reported H2O exposures occur at latitudes poleward of 30° in fresh craters near rim shadows, have a surface area < 7 km2, and are associated with one or more surface features such as a morphological flow or landslide, fractures, high albedo, or a pole-facing slope (one case is confirmed to be adjacent to persistent shadow). In four occurrences, these detections are associated with small (< 0.1 km2) high-albedo areas that can be recognized in high-resolution imagery (∼35 m/pixel) from the Framing Camera (FC). Since all these observations are compatible with an H2O-rich subsurface, the replenishment of surficial H2O likely comes from the ice that is present underneath. In four other occurrences, H2O is detected on walls and floors of fresh impact craters, either in the shadow or adjacent to shadows, which suggests that local thermodynamical conditions may also favor the concentration of H2O in these areas.

Item URL in elib:https://elib.dlr.de/124936/
Document Type:Article
Title:Exposed H2O-rich areas detected on Ceres with the dawn visible and infrared mapping spectrometer
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Combe, J.-P.Bear Fight Center, A Columbus Technologies and Services Inc. Affiliate, P.O. Box 667, 22 Fiddler's Road, Winthrop, WA 98862, USAUNSPECIFIED
Raponi, AINAF-IAPS Istituto di Astrofisica e Planetologia Spaziali, Rome, ItalyUNSPECIFIED
Tosi, F.INAF-IAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
De Sanctis, M.C.Istituto Nazionale di Astrofisica, Rome, Italy.UNSPECIFIED
Carrozzo, F. G.INAF-IASF Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma ItalyUNSPECIFIED
Zambon, F.INAF-IAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
Ammannito, E.INAF, Istituto di Fisica Dello Spazio Interplanetario, Roma, ItalyUNSPECIFIED
Hughson, K.University of California Los AngelesUNSPECIFIED
Nathues, A.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIED
Hoffmann, M.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIED
Platz, ThomasMax Planck Institut für SonnensystemforschungUNSPECIFIED
Thangjam, G. S.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
Schorghofer, NorbertPlanetary Science Institute, Tucson, AZ, USAUNSPECIFIED
Schröder, StefanStefanus.Schroeder (at) dlr.dehttps://orcid.org/0000-0003-0323-8324
Byrne, ShaneLunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USAUNSPECIFIED
Landis, M. E.lunar and planetary laboratory, university of arizona, tucson, az, usaUNSPECIFIED
Ruesch, OttavianoESA-ESTEC, European Space Agency, Keplerlaan 1, 2201 AZ Noordwijk, The NetherlandsUNSPECIFIED
McCord, Thomas B.Bear Fight Institute, Winthrop, WA, United States.UNSPECIFIED
Johnson, KatherineBear Fight Institute, Winthrop, WA, USAUNSPECIFIED
Singh, SandeepBear Fight Institute, Wa, USAUNSPECIFIED
Raymond, C.A.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USAUNSPECIFIED
Russell, C.T.Institute of Geophysics, University of California, Los Angeles, Los Angeles, CA 90095UNSPECIFIED
Date:2019
Journal or Publication Title:Icarus
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:318
DOI :10.1016/j.icarus.2017.12.008
Page Range:pp. 22-41
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Dwarf planet Ceres Surface composition Exposed H2O ice Reflectance spectroscopy
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 - Projekt DAWN
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Schröder, Dr. Stefan
Deposited On:12 Dec 2018 12:47
Last Modified:12 Dec 2018 12:47

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