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Exposed water ice on the nucleus of comet 67P/Churyumov Gerasimenko
Filacchione, G. and De Sanctis, M.C. and Capaccioni, F. and Raponi, A. and Tosi, F. and Ciarniello, M. and Cerroni, P. and Piccioni, G. and Capria, M. T. and Palomba, E. and Belluci, G. and Erard, S. and Bockelee-Morvan, D. and Leyrat, C. and Arnold, Gabriele and Barucci, M. A. and Fulchignoni, M. and Schmitt, B. and Quirico, E. and Jaumann, R. and Stephan, K. and Longobardo, A and Mennella, V. and Migliorini, A. and Ammannito, E. and Benkhoff, J. and Bibring, Jean-Pierre and Blanco, A. and Blecka, M. and Carlson, R. W. and Carsenty, U. and Colangeli, L. and Combes, M. and Combi, M. and Crovisier, J. and Drossart, P. and Encrenaz, E.T. and Federico, C. and Fink, U. and Fonti, S. and Ip, W-H. and Kührt, E. and Langevin, Y. and Magni, G. and McCord, Thomas B. and Moroz, Liubov and Mottola, S. and Orofino, V. and Schade, U. and Taylor, F.W. and Tiphene, D. and Tozzi, G. and Beck, P. and Biver, N and Bonal, L. and Combe, J. P. and Despan, D. and Flamini, E. and Formisano, M. and Fornasier, S. and Frigeri, A. and Grassi, D. and Gudipati, M. and Kappel, David and Mancarella, F. and Markus, Kathrin and Merlin, F. and Orosei, R. and Rinaldi, G. and Cartacci, M. and Cicchetti, A. and Giuppi, S. and Hello, Y. and Henry, Florence and Jacquinod, S. and Reess, J. M. and Noschese, R. and Politi, R. and Peter, Gisbert
(2016)
Exposed water ice on the nucleus of comet 67P/Churyumov Gerasimenko.
Nature, 529, pp. 368-372.
Nature Publishing Group.
doi: 10.1038/nature16190.
ISSN 0028-0836.
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Official URL: http://www.nature.com/nature/journal/v529/n7586/pdf/nature16190.pdf AbstractAlthough water vapour is the main species observed in the coma of comet 67P/Churyumov Gerasimenko and water is the major constituent of cometary nuclei, limited evidence for exposed water ice regions on the surface of the nucleus has been found so far. The absence of large regions of exposed water ice seems a common finding on the surfaces of many of the comets observed so far. The nucleus of 67P/Churyumov Gerasimenko appears to be fairly uniformly coated with dark, dehydrated, refractory and organic rich material. Here we report the identification at infrared wavelengths of water ice on two debris falls in the Imhotep region of the nucleus. The ice has been exposed on the walls of elevated structures and at the base of the walls. A quantitative derivation of the abundance of ice in these regions indicates the presence of millimetre sized pure water-ice grains, considerably larger than in all previous observations. Although micrometresized water ice grains are the usual result of vapour recondensation in ice free layers, the occurrence of millimetre sized grains of pure ice as observed in the Imhotep debris falls is best explained by grain growth by vapour diffusion in ice rich layers, or by sintering. As a consequence of these processes, the nucleus can develop an extended and complex coating in which the outer dehydrated crust is superimposed on layers enriched in water ice. The stratigraphy observed on 67P/Churyumov Gerasimenko is therefore the result of evolutionary processes affecting the uppermost metres of the nucleus and does not necessarily require a global layering to have occurred at the time of the comet s formation. Item URL in elib: | https://elib.dlr.de/114634/ |
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Document Type: | Article |
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Title: | Exposed water ice on the nucleus of comet 67P/Churyumov Gerasimenko |
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Authors: | Authors | Institution or Email of Authors | Author's ORCID iD |
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Filacchione, G. | inaf-iasf, rome, italy | UNSPECIFIED | De Sanctis, M.C. | istituto nazionale di astrofisica, rome, italy. | UNSPECIFIED | Capaccioni, F. | inaf-iasf, italy | UNSPECIFIED | Raponi, A. | inaf-iasf, italy | UNSPECIFIED | Tosi, F. | inaf-iasf istituto di astrofisica spaziale e fisica cosmica, roma italy | UNSPECIFIED | Ciarniello, M. | inaf-iasf, italy | UNSPECIFIED | Cerroni, P. | inaf-iasf, rome, italy | UNSPECIFIED | Piccioni, G. | inaf-iasf | UNSPECIFIED | Capria, M. T. | instituto di astrofisica spaziale e fisica cosmica, roma, italy | UNSPECIFIED | Palomba, E. | institute for interplanetary space physics - inaf, rome, italy | UNSPECIFIED | Belluci, G. | istituto di fisica dello spazio interplanetario inaf-ifsi, via del fosso del cavaliere 100, 00133 roma, italy | UNSPECIFIED | Erard, S. | lesia | UNSPECIFIED | Bockelee-Morvan, D. | observatoire de paris, meudon | UNSPECIFIED | Leyrat, C. | lesia | UNSPECIFIED | Arnold, Gabriele | gabriele.arnold (at) dlr.de | UNSPECIFIED | Barucci, M. A. | observatoire de paris, meudon, france | UNSPECIFIED | Fulchignoni, M. | marcello.fulchignoni (at) obspm.fr | UNSPECIFIED | Schmitt, B. | grenoble planetology laboratory | UNSPECIFIED | Quirico, E. | laboratory of planetology, cnrs joseph fourier university | UNSPECIFIED | Jaumann, R. | ralf.jaumann (at) dlr.de | UNSPECIFIED | Stephan, K. | katrin.stephan (at) dlr.de | UNSPECIFIED | Longobardo, A | inaf-laps, via del fosso del cavaliere 100, i-00133 rome, italy | UNSPECIFIED | Mennella, V. | inaf-oac, napoli, italy | UNSPECIFIED | Migliorini, A. | inaf-iasf | UNSPECIFIED | Ammannito, E. | inaf, istituto di fisica dello spazio interplanetario, roma, italy | UNSPECIFIED | Benkhoff, J. | estec, noordwijk, niederlande | UNSPECIFIED | Bibring, Jean-Pierre | institut d'astrophysique spatiale | UNSPECIFIED | Blanco, A. | universita degli studi di lecce | UNSPECIFIED | Blecka, M. | polish academi of sciences, warsaw, poland | UNSPECIFIED | Carlson, R. W. | jet propulsion laboratory | UNSPECIFIED | Carsenty, U. | uri.carsenty (at) dlr.de | UNSPECIFIED | Colangeli, L. | osservatiori astronomico di capodimonte, italy | UNSPECIFIED | Combes, M. | observatoire de paris, meudon, france | UNSPECIFIED | Combi, M. | space physics research laboratory, the university of michigan, ann arbor, usa | UNSPECIFIED | Crovisier, J. | observatoire de paris-meudon, france | UNSPECIFIED | Drossart, P. | observatoire de paris, meudon, france | UNSPECIFIED | Encrenaz, E.T. | lesia observatoire de paris, meudon, france | UNSPECIFIED | Federico, C. | università di perugia, italy | UNSPECIFIED | Fink, U. | lunar planetary laboratory, univarsity of arizona, tucson, usa | UNSPECIFIED | Fonti, S. | dipartimento di fisica, università di lecce, italy | UNSPECIFIED | Ip, W-H. | institute for space science, national central university, chung li, taiwan | UNSPECIFIED | Kührt, E. | ekkehard.kuehrt (at) dlr.de | UNSPECIFIED | Langevin, Y. | institut d’astrophisique spatiale, orsay, france | UNSPECIFIED | Magni, G. | inaf/instituto di astrofisica spaziale e fisica cosmica, rome, italy | UNSPECIFIED | McCord, Thomas B. | bear fight institute, winthrop, wa, united states. | UNSPECIFIED | Moroz, Liubov | Ljuba.Moroz (at) dlr.de | UNSPECIFIED | Mottola, S. | stefano.mottola (at) dlr.de | UNSPECIFIED | Orofino, V. | universita degli studi di lecce | UNSPECIFIED | Schade, U. | bessy gmbh | UNSPECIFIED | Taylor, F.W. | university of oxford | UNSPECIFIED | Tiphene, D. | despa, observatoire de paris/meudon, 92195 meudon, france | UNSPECIFIED | Tozzi, G. | osservatorio astrofisico di arcetri, firenze, italy | UNSPECIFIED | Beck, P. | laboratoire de planétologie de grenoble (lpg) - university joseph fourier grenoble, grenboble, france | UNSPECIFIED | Biver, N | observatoire de paris | UNSPECIFIED | Bonal, L. | université grenoble alpes, cnrs, institut de planétologie et d’astrophysique de grenoble, grenoble, france | UNSPECIFIED | Combe, J. P. | space science inst., winthrop wa, usa, lab. de planetologie et de geodynamique, u. de nantes, nantes, france | UNSPECIFIED | Despan, D. | laboratoire d’etudes spatiales et d’instrumentation en astrophysique, observatoire de paris/cnrs/université pierre et marie curie/université paris-diderot, meudon, france | UNSPECIFIED | Flamini, E. | asi, agenzia spaziale italiana, viale liegi 26, 00198 rome, italy; lunar and planetary laboratory and steward observatory, university of arizona, tucson, az 85721, usa | UNSPECIFIED | Formisano, M. | inaf-iasf, italy | UNSPECIFIED | Fornasier, S. | observatoire de paris-meudon, france | UNSPECIFIED | Frigeri, A. | national institute of astrophysics, rome, italy | UNSPECIFIED | Grassi, D. | inaf-ifsi, rome, italy | UNSPECIFIED | Gudipati, M. | nasa jet propulsion laboratory, pasadena, ca 91109, usa | UNSPECIFIED | Kappel, David | david.kappel (at) dlr.de | UNSPECIFIED | Mancarella, F. | dipartimento di matematica e fisica "e. de giorgi", università del salento, lecce, italy | UNSPECIFIED | Markus, Kathrin | westfälische wilhelms-universität münster | UNSPECIFIED | Merlin, F. | lesia-observatoire de paris | UNSPECIFIED | Orosei, R. | inaf-iasf, rome, italy | UNSPECIFIED | Rinaldi, G. | istituto di fisica dello spazio interplanetario (ifsi-inaf), rome - italy | UNSPECIFIED | Cartacci, M. | istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italy | UNSPECIFIED | Cicchetti, A. | istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italy | UNSPECIFIED | Giuppi, S. | ifsi | UNSPECIFIED | Hello, Y. | despa, observatoire de paris/meudon, 92195 meudon, france | UNSPECIFIED | Henry, Florence | observatoire de paris-meudon, france | UNSPECIFIED | Jacquinod, S. | laboratoire d’etudes spatiales et d’instrumentation en astrophysique, observatoire de paris/cnrs/université pierre et marie curie/université paris-diderot, meudon, france | UNSPECIFIED | Reess, J. M. | laboratoire d’etudes spatiales et d’instrumentation en astrophysique, observatoire de paris/cnrs/université pierre et marie curie/université paris-diderot, meudon, france | UNSPECIFIED | Noschese, R. | istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italy | UNSPECIFIED | Politi, R. | istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italy | UNSPECIFIED | Peter, Gisbert | gisbert.peter (at) dlr.de | UNSPECIFIED |
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Date: | 2016 |
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Journal or Publication Title: | Nature |
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Refereed publication: | Yes |
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Open Access: | No |
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Gold Open Access: | No |
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In SCOPUS: | Yes |
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In ISI Web of Science: | Yes |
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Volume: | 529 |
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DOI
: | 10.1038/nature16190 |
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Page Range: | pp. 368-372 |
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Publisher: | Nature Publishing Group |
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ISSN: | 0028-0836 |
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Status: | Published |
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Keywords: | Rosetta; comet 67P; water ice; VIRTIS |
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HGF - Research field: | Aeronautics, Space and Transport |
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HGF - Program: | Space |
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HGF - Program Themes: | Space Exploration |
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DLR - Research area: | Raumfahrt |
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DLR - Program: | R EW - Space Exploration |
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DLR - Research theme (Project): | R - Project ROSETTA Instruments, R - Projekt ROSETTA Lander (old) |
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Location: |
Berlin-Adlershof
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Institutes and Institutions: | Institute of Planetary Research > Asteroids and Comets Institute of Planetary Research > Leitungsbereich PF Institute of Planetary Research > Planetary Geology Institute of Optical Sensor Systems > Space Instruments |
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Deposited By: |
Schubert, Renate
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Deposited On: | 10 Nov 2017 12:37 |
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Last Modified: | 08 Mar 2018 18:47 |
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