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Rosetta's comet 67P/Churyumov-Gerasimenko sheds its dusty mantle to reveal its icy nature.
Fornasier, S; Mottola, S; Keller, H U; Barucci, M A; Davidsson, B; Feller, C; Deshapriya, J D P; Sierks, H; Barbieri, C; Lamy, P L; Rodrigo, R; Koschny, D; Rickman, H; A'Hearn, M; Agarwal, J; Bertaux, J-L; Bertini, I; Besse, S; Cremonese, G; Da Deppo, V; Debei, S; De Cecco, M; Deller, J; El-Maarry, M R; Fulle, M; Groussin, O; Gutierrez, P J; Güttler, C; Hofmann, M; Hviid, S F; Ip, W-H; Jorda, L; Knollenberg, J; Kovacs, G; Kramm, R; Kührt, E; Küppers, M; Lara, M L; Lazzarin, M; Moreno, J J Lopez; Marzari, F; Massironi, M; Naletto, G; Oklay, N; Pajola, M; Pommerol, A; Preusker, F; Scholten, F; Shi, X; Thomas, N.
Afiliación
  • Fornasier S; Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, Sorbonne Paris Cité, UPMC Université Paris 06, Sorbonne Universités, 5 Place J. Janssen, Meudon Principal Cedex 92195, France. sonia.fornasier
  • Mottola S; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Planetenforschung, Asteroiden und Kometen, Rutherfordstrafle 2, 12489 Berlin, Germany.
  • Keller HU; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Planetenforschung, Asteroiden und Kometen, Rutherfordstrafle 2, 12489 Berlin, Germany.
  • Barucci MA; Institut für Geophysik und Extraterrestrische Physik (IGEP), Technische Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany.
  • Davidsson B; Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, Sorbonne Paris Cité, UPMC Université Paris 06, Sorbonne Universités, 5 Place J. Janssen, Meudon Principal Cedex 92195, France.
  • Feller C; Jet Propulsion Laboratory, M/S 183-301, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
  • Deshapriya JD; Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, Sorbonne Paris Cité, UPMC Université Paris 06, Sorbonne Universités, 5 Place J. Janssen, Meudon Principal Cedex 92195, France.
  • Sierks H; Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, Sorbonne Paris Cité, UPMC Université Paris 06, Sorbonne Universités, 5 Place J. Janssen, Meudon Principal Cedex 92195, France.
  • Barbieri C; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany.
  • Lamy PL; Department of Physics and Astronomy, University of Padova, Vicolo dell'Osservatorio 3, 35122 Padova, Italy.
  • Rodrigo R; Laboratoire d'Astrophysique de Marseille, UMR 7326 CNRS and Université Aix-Marseille, 38 Rue Frédéric Joliot-Curie, 13388 Marseille Cedex 13, France.
  • Koschny D; Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomia s/n, 18008 Granada, Spain.
  • Rickman H; International Space Science Institute, Hallerstrasse 6, 3012 Bern, Switzerland.
  • A'Hearn M; Scientific Support Office, European Space Research and Technology Centre/ESA, Keplerlaan 1, Postbus 299, 2201 AZ Noordwijk ZH, Netherlands.
  • Agarwal J; Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden.
  • Bertaux JL; Polish Academy of Sciences, Space Research Center, Bartycka 18A, 00716 Warszawa, Poland.
  • Bertini I; Department of Astronomy, University of Maryland, College Park, MD 20742-2421, USA.
  • Besse S; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany.
  • Cremonese G; Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) CNRS/UVSQ/IPSL, 11 Boulevard d'Alembert, 78280, Guyancourt, France.
  • Da Deppo V; Department of Physics and Astronomy, University of Padova, Vicolo dell'Osservatorio 3, 35122 Padova, Italy.
  • Debei S; Operations Department, European Space Astronomy Centre/ESA, P.O. Box 78, 28691 Villanueva de la Canada, Madrid, Spain.
  • De Cecco M; Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy.
  • Deller J; CNR-IFN UOS Padova LUXOR, Via Trasea, 7, 35131 Padova, Italy.
  • El-Maarry MR; Department of Mechanical Engineering - University of Padova, via Venezia 1, 35131 Padova, Italy.
  • Fulle M; University of Trento, Via Mesiano 77, 38100 Trento, Italy.
  • Groussin O; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany.
  • Gutierrez PJ; Physikalisches Institut der Universität Bern, Sidlerstrasse 5, 3012 Bern, Switzerland.
  • Güttler C; INAF, Osservatorio Astronomico, Via Tiepolo 11, 34014 Trieste, Italy.
  • Hofmann M; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 Rue Frédéric Joliot-Curie, 13388 Marseille Cedex 13, France.
  • Hviid SF; Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomia s/n, 18008 Granada, Spain.
  • Ip WH; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany.
  • Jorda L; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany.
  • Knollenberg J; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Planetenforschung, Asteroiden und Kometen, Rutherfordstrafle 2, 12489 Berlin, Germany.
  • Kovacs G; Graduate Institute of Astronomy, National Central University, 300 Chung-Da Rd, Chung-Li 32054 Taiwan.
  • Kramm R; Space Science Institute, Macau University of Science and Technology, Macau, China.
  • Kührt E; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 Rue Frédéric Joliot-Curie, 13388 Marseille Cedex 13, France.
  • Küppers M; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Planetenforschung, Asteroiden und Kometen, Rutherfordstrafle 2, 12489 Berlin, Germany.
  • Lara ML; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany.
  • Lazzarin M; Budapest University of Technology and Economics, Budapest, Hungary.
  • Moreno JJ; Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany.
  • Marzari F; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Planetenforschung, Asteroiden und Kometen, Rutherfordstrafle 2, 12489 Berlin, Germany.
  • Massironi M; Operations Department, European Space Astronomy Centre/ESA, P.O. Box 78, 28691 Villanueva de la Canada, Madrid, Spain.
  • Naletto G; Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomia s/n, 18008 Granada, Spain.
  • Oklay N; Department of Physics and Astronomy, University of Padova, Vicolo dell'Osservatorio 3, 35122 Padova, Italy.
  • Pajola M; Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomia s/n, 18008 Granada, Spain.
  • Pommerol A; Department of Physics and Astronomy, University of Padova, Vicolo dell'Osservatorio 3, 35122 Padova, Italy.
  • Preusker F; Dipartimento di Geoscienze, University of Padova, Via G. Gradenigo 6, 35131 Padova, Italy.
  • Scholten F; Center of Studies and Activities for Space (CISAS), G. Colombo, University of Padova, Via Venezia 15, 35131 Padova, Italy.
  • Shi X; University of Padova, Department of Information Engineering, Via Gradenigo 6/B, 35131 Padova, Italy.
  • Thomas N; Center of Studies and Activities for Space (CISAS), G. Colombo, University of Padova, Via Venezia 15, 35131 Padova, Italy.
Science ; 354(6319): 1566-1570, 2016 12 23.
Article en En | MEDLINE | ID: mdl-27856849
ABSTRACT
The Rosetta spacecraft has investigated comet 67P/Churyumov-Gerasimenko from large heliocentric distances to its perihelion passage and beyond. We trace the seasonal and diurnal evolution of the colors of the 67P nucleus, finding changes driven by sublimation and recondensation of water ice. The whole nucleus became relatively bluer near perihelion, as increasing activity removed the surface dust, implying that water ice is widespread underneath the surface. We identified large (1500 square meters) ice-rich patches appearing and then vanishing in about 10 days, indicating small-scale heterogeneities on the nucleus. Thin frosts sublimating in a few minutes are observed close to receding shadows, and rapid variations in color are seen on extended areas close to the terminator. These cyclic processes are widespread and lead to continuously, slightly varying surface properties.

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Science Año: 2016 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Science Año: 2016 Tipo del documento: Article