@article{f2ea2d1cc92e457dacc23dbb576db802,
title = "Ceres{\textquoteright} spectral link to carbonaceous chondrites—Analysis of the dark background materials",
abstract = "Ceres{\textquoteright} surface has commonly been linked with carbonaceous chondrites (CCs) by ground-based telescopic observations, because of its low albedo, flat to red-sloped spectra in the visible and near-infrared (VIS/NIR) wavelength region, and the absence of distinct absorption bands, though no currently known meteorites provide complete spectral matches to Ceres. Spatially resolved data of the Dawn Framing Camera (FC) reveal a generally dark surface covered with bright spots exhibiting reflectance values several times higher than Ceres{\textquoteright} background. In this work, we investigated FC data from High Altitude Mapping Orbit (HAMO) and Ceres eXtended Juling (CXJ) orbit (~140 m/pixel) for global spectral variations. We found that the cerean surface mainly differs by spectral slope over the whole FC wavelength region (0.4–1.0 μm). Areas exhibiting slopes <−10% μm−1 constitute only ~3% of the cerean surface and mainly occur in the bright material in and around young craters, whereas slopes ≥−10% μm−1 occur on more than 90% of the cerean surface; the latter being denoted as Ceres{\textquoteright} background material in this work. FC and Visible and Infrared Spectrometer (VIR) spectra of this background material were compared to the suite of CCs spectrally investigated so far regarding their VIS/NIR region and 2.7 μm absorption, as well as their reflectance at 0.653 μm. This resulted in a good match to heated CI Ivuna (heated to 200–300 °C) and a better match for CM1 meteorites, especially Moapa Valley. This possibly indicates that the alteration of CM2 to CM1 took place on Ceres.",
author = "Michael Sch{\"a}fer and Tanja Sch{\"a}fer and Izawa, {Matthew R.M.} and Cloutis, {Edward A.} and Schr{\"o}der, {Stefan E.} and Thomas Roatsch and Frank Preusker and Katrin Stephan and Matz, {Klaus Dieter} and Raymond, {Carol A.} and Russell, {Christopher T.}",
note = "Funding Information: The authors thank the three referees Bethany Ehlmann, Lucy A. McFadden, and Paul G. Lucey for their valuable comments that helped to improve the manuscript. M. S. and T. S. thank Julie Castillo-Rogez for helpful comments on Ceres? thermal evolution, Cristina De Sanctis for helpful comments on carbonates, and Kurt Mengel for helpful discussions and comments on meteorites. The authors thank Driss Takir for providing his vacuum spectra of meteorites. The authors thank the Dawn Flight team and the Dawn FC and VIR instrument teams at MPS, DLR, and INAF for successful operations at Ceres. The Dawn FC project is financially supported by Max Planck Society, German Aerospace Center (DLR), and NASA/JPL. M. S. is grateful to Ralf Jaumann, DLR, for enabling this work. T. S. thanks the International Max Planck Research School (IMPRS) at MPS for funding. E. A. C. thanks the Canadian Space Agency, the Canada Foundation for Innovation, the Manitoba Research Innovation Fund, the Natural Sciences and Engineering Research Council of Canada, and the University of Winnipeg for supporting this study. We are thankful to all the numerous authors who contributed their spectra to RELAB facility and those people who kept running these facilities and enabled access to the data. T. S. and M. S. thank A. S. for nighttime peace. Funding Information: Acknowledgments—The authors thank the three referees Bethany Ehlmann, Lucy A. McFadden, and Paul G. Lucey for their valuable comments that helped to improve the manuscript. M. S. and T. S. thank Julie Castillo-Rogez for helpful comments on Ceres{\textquoteright} thermal evolution, Cristina De Sanctis for helpful comments on carbonates, and Kurt Mengel for helpful discussions and comments on meteorites. The authors thank Driss Takir for providing his vacuum spectra of meteorites. The authors thank the Dawn Flight team and the Dawn FC and VIR instrument teams at MPS, DLR, and INAF for successful operations at Ceres. The Dawn FC project is financially supported by Max Planck Society, German Aerospace Center (DLR), and NASA/JPL. M. S. is grateful to Ralf Jaumann, DLR, for enabling this work. T. S. thanks the International Max Planck Research School (IMPRS) at MPS for funding. E. A. C. thanks the Canadian Space Agency, the Canada Foundation for Innovation, the Manitoba Research Innovation Fund, the Natural Sciences and Engineering Research Council of Canada, and the University of Winnipeg for supporting this study. We are thankful to all the numerous authors who contributed their spectra to RELAB facility and those people who kept running these facilities and enabled access to the data. T. S. and M. S. thank A. S. for nighttime peace. Publisher Copyright: {\textcopyright} The Meteoritical Society, 2018.",
year = "2018",
month = sep,
doi = "10.1111/maps.13079",
language = "English",
volume = "53",
pages = "1925--1945",
journal = "Meteoritics and Planetary Science",
issn = "1086-9379",
publisher = "The University of Arkansas Press",
number = "9",
}