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Distribution of phyllosilicates on the surface of Ceres.
Ammannito, E; DeSanctis, M C; Ciarniello, M; Frigeri, A; Carrozzo, F G; Combe, J-Ph; Ehlmann, B L; Marchi, S; McSween, H Y; Raponi, A; Toplis, M J; Tosi, F; Castillo-Rogez, J C; Capaccioni, F; Capria, M T; Fonte, S; Giardino, M; Jaumann, R; Longobardo, A; Joy, S P; Magni, G; McCord, T B; McFadden, L A; Palomba, E; Pieters, C M; Polanskey, C A; Rayman, M D; Raymond, C A; Schenk, P M; Zambon, F; Russell, C T.
Afiliación
  • Ammannito E; Earth Planetary and Space Sciences, University of California-Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA. eleonora.ammannito@igpp.ucla.edu.
  • DeSanctis MC; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Ciarniello M; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Frigeri A; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Carrozzo FG; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Combe JP; The Bear Fight Institute, Winthrop, WA 98862, USA.
  • Ehlmann BL; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
  • Marchi S; Southwest Research Institute, Boulder, CO 80302, USA.
  • McSween HY; Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, TN 37996-1410, USA.
  • Raponi A; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Toplis MJ; Institut de Recherche en Astrophysique et Planétologie (UMR 5277), Université de Toulouse, F-31400 Toulouse, France.
  • Tosi F; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Castillo-Rogez JC; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
  • Capaccioni F; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Capria MT; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Fonte S; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Giardino M; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Jaumann R; Institute of Planetary Research, Deutsches Zentrum für Luft- und Raumfahrt, 12489 Berlin, Germany.
  • Longobardo A; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Joy SP; Earth Planetary and Space Sciences, University of California-Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA.
  • Magni G; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • McCord TB; The Bear Fight Institute, Winthrop, WA 98862, USA.
  • McFadden LA; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.
  • Palomba E; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Pieters CM; Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI 02912, USA.
  • Polanskey CA; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
  • Rayman MD; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
  • Raymond CA; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
  • Schenk PM; Lunar and Planetary Institute, Houston, TX 77058, USA.
  • Zambon F; Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, 00133 Roma, Italy.
  • Russell CT; Earth Planetary and Space Sciences, University of California-Los Angeles, 603 Charles Young Drive, Los Angeles, CA 90095-1567, USA.
Science ; 353(6303)2016 09 02.
Article en En | MEDLINE | ID: mdl-27701086
The dwarf planet Ceres is known to host phyllosilicate minerals at its surface, but their distribution and origin have not previously been determined. We used the spectrometer onboard the Dawn spacecraft to map their spatial distribution on the basis of diagnostic absorption features in the visible and near-infrared spectral range (0.25 to 5.0 micrometers). We found that magnesium- and ammonium-bearing minerals are ubiquitous across the surface. Variations in the strength of the absorption features are spatially correlated and indicate considerable variability in the relative abundance of the phyllosilicates, although their composition is fairly uniform. These data, along with the distinctive spectral properties of Ceres relative to other asteroids and carbonaceous meteorites, indicate that the phyllosilicates were formed endogenously by a globally widespread and extensive alteration process.
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2016 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2016 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos