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FC colour images of dwarf planet Ceres reveal a complicated geological history

Nathues, A. and Hoffmann, M. and Platz, Thomas and Thangjam, G. S. and Cloutis, E. and Reddy, V. and Corre, L. Le and Li, J.-Y and Mengel, K. and Rivkin, A. and Applin, D.M. and Schaefer, M. and Christensen, U. and Sierks, H. and Ripken, J. and Schmidt, Britney E. and Hiesinger, H. and Sykes, Mark V. and Sizemore, H. G. and Preusker, Frank and Russell, C.T. (2016) FC colour images of dwarf planet Ceres reveal a complicated geological history. Planetary and Space Science, 134, pp. 122-127. Elsevier. DOI: 10.1016/j.pss.2016.10.017 ISSN 0032-0633

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Official URL: http://www.sciencedirect.com/science/article/pii/S0032063316301611?via%3Dihub

Abstract

The dwarf planet Ceres (equatorial diameter 963km) is the largest object that has remained in the main asteroid belt (Russell and Raymond, 2012), while most large bodies have been destroyed or removed by dynamical processes (Petit et al. 2001; Minton and Malhotra, 2009). Pre-Dawn investigations (McCord and Sotin, 2005; Castillo-Rogez and McCord, 2010; Castillo-Rogez et al., 2011) suggest that Ceres is a thermally evolved, but still volatile-rich body with potential geological activity, that was never completely molten, but possibly differentiated into a rocky core, an ice-rich mantle, and may contain remnant internal liquid water. Thermal alteration should contribute to producing a (dark) carbonaceous chondritic-like surface (McCord and Sotin, 2005; Castillo-Rogez and McCord, 2010; Castillo-Rogez et al., 2011; Nathues et al., 2015) containing ammoniated phyllosilicates (King et al., 1992; De Sanctis et al., 2015 and 2016). Here we show and analyse global contrast-rich colour mosaics, derived from a camera on-board Dawn at Ceres (Russell et al., 2016). Colours are unexpectedly more diverse on global scale than anticipated by Hubble Space Telescope (Li et al., 2006) and ground-based observations (Reddy et al. 2015). Dawn data led to the identification of five major colour units. The youngest units identified by crater counting, termed bright and bluish units, are exclusively found at equatorial and intermediate latitudes. We identified correlations between the distribution of the colour units, crater size, and formation age, inferring a crustal stratigraphy. Surface brightness and spectral properties are not correlated. The youngest surface features are the bright spots at crater Occator (~Ø 92km). Their colour spectra are highly consistent with the presence of carbonates while most of the remaining surface resembles modifications of various types of ordinary carbonaceous chondrites

Item URL in elib:https://elib.dlr.de/115202/
Document Type:Article
Title:FC colour images of dwarf planet Ceres reveal a complicated geological history
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nathues, A.max-planck institute for solar system research, katlenburg-lindau, germanyUNSPECIFIED
Hoffmann, M.max planck institute for solar system research , katlenburg-lindau, germanyUNSPECIFIED
Platz, Thomasmax planck institut für sonnensystemforschungUNSPECIFIED
Thangjam, G. S.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
Cloutis, E.university of winnipeg, winnipeg, canadaUNSPECIFIED
Reddy, V.department of space studies, university of north dakota, grand forks, nd 58202, usaUNSPECIFIED
Corre, L. Lemax-planck institute for solar system research, katlenburg-lindau, germanyUNSPECIFIED
Li, J.-Yplanetary science institute, tucson, arizona 85719, usaUNSPECIFIED
Mengel, K.Tech Univ Clausthal, IELF, Clatsthal Zellerfeld, GermanyUNSPECIFIED
Rivkin, A.john hopkins university applied physics laboratory, laured, md, usaUNSPECIFIED
Applin, D.M.university of winnipeg, winnipeg, canadaUNSPECIFIED
Schaefer, M.max-planck institute for solar system research, 37077 göttingen, germanyUNSPECIFIED
Christensen, U.max-planck-institut für sonnensystemforschung, katlenburg-lindauUNSPECIFIED
Sierks, H.max-planck-institut für sonnensystemforschung, katlenburg-lindau, germanyUNSPECIFIED
Ripken, J.max-planck-institut für sonnensystemforschung, justus-von-liebig-weg 3, 37077 göttingen, germanyUNSPECIFIED
Schmidt, Britney E.georgia institute of technologyUNSPECIFIED
Hiesinger, H.westfälische wilhelms-universität münsterUNSPECIFIED
Sykes, Mark V.planetary science institute, tucson, az, united states.UNSPECIFIED
Sizemore, H. G.planetary science instituteUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Russell, C.T.institute of geophysics, university of california, los angeles, los angeles, ca 90095UNSPECIFIED
Date:December 2016
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:134
DOI :10.1016/j.pss.2016.10.017
Page Range:pp. 122-127
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:Asteroid, Ceres, Colour spectra, Imaging, Mineralogy, Surface, Topography
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 Geodesy
Deposited By: Scholten, Dipl.-Ing. Frank
Deposited On:10 Nov 2017 12:55
Last Modified:08 Mar 2018 18:49

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