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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

Abstract

Although 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/
Document Type:Article
Title:Exposed water ice on the nucleus of comet 67P/Churyumov Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Filacchione, G.inaf-iasf, rome, italyUNSPECIFIEDUNSPECIFIED
De Sanctis, M.C.istituto nazionale di astrofisica, rome, italy.UNSPECIFIEDUNSPECIFIED
Capaccioni, F.inaf-iasf, italyUNSPECIFIEDUNSPECIFIED
Raponi, A.inaf-iasf, italyUNSPECIFIEDUNSPECIFIED
Tosi, F.inaf-iasf istituto di astrofisica spaziale e fisica cosmica, roma italyUNSPECIFIEDUNSPECIFIED
Ciarniello, M.inaf-iasf, italyUNSPECIFIEDUNSPECIFIED
Cerroni, P.inaf-iasf, rome, italyUNSPECIFIEDUNSPECIFIED
Piccioni, G.inaf-iasfUNSPECIFIEDUNSPECIFIED
Capria, M. T.instituto di astrofisica spaziale e fisica cosmica, roma, italyUNSPECIFIEDUNSPECIFIED
Palomba, E.institute for interplanetary space physics - inaf, rome, italyUNSPECIFIEDUNSPECIFIED
Belluci, G.istituto di fisica dello spazio interplanetario inaf-ifsi, via del fosso del cavaliere 100, 00133 roma, italyUNSPECIFIEDUNSPECIFIED
Erard, S.lesiaUNSPECIFIEDUNSPECIFIED
Bockelee-Morvan, D.observatoire de paris, meudonUNSPECIFIEDUNSPECIFIED
Leyrat, C.lesiaUNSPECIFIEDUNSPECIFIED
Arnold, GabrieleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barucci, M. A.observatoire de paris, meudon, franceUNSPECIFIEDUNSPECIFIED
Fulchignoni, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schmitt, B.grenoble planetology laboratoryUNSPECIFIEDUNSPECIFIED
Quirico, E.laboratory of planetology, cnrs joseph fourier universityUNSPECIFIEDUNSPECIFIED
Jaumann, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stephan, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Longobardo, Ainaf-laps, via del fosso del cavaliere 100, i-00133 rome, italyUNSPECIFIEDUNSPECIFIED
Mennella, V.inaf-oac, napoli, italyUNSPECIFIEDUNSPECIFIED
Migliorini, A.inaf-iasfUNSPECIFIEDUNSPECIFIED
Ammannito, E.inaf, istituto di fisica dello spazio interplanetario, roma, italyUNSPECIFIEDUNSPECIFIED
Benkhoff, J.estec, noordwijk, niederlandeUNSPECIFIEDUNSPECIFIED
Bibring, Jean-Pierreinstitut d'astrophysique spatialeUNSPECIFIEDUNSPECIFIED
Blanco, A.universita degli studi di lecceUNSPECIFIEDUNSPECIFIED
Blecka, M.polish academi of sciences, warsaw, polandUNSPECIFIEDUNSPECIFIED
Carlson, R. W.jet propulsion laboratoryUNSPECIFIEDUNSPECIFIED
Carsenty, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Colangeli, L.osservatiori astronomico di capodimonte, italyUNSPECIFIEDUNSPECIFIED
Combes, M.observatoire de paris, meudon, franceUNSPECIFIEDUNSPECIFIED
Combi, M.space physics research laboratory, the university of michigan, ann arbor, usaUNSPECIFIEDUNSPECIFIED
Crovisier, J.observatoire de paris-meudon, franceUNSPECIFIEDUNSPECIFIED
Drossart, P.observatoire de paris, meudon, franceUNSPECIFIEDUNSPECIFIED
Encrenaz, E.T.lesia observatoire de paris, meudon, franceUNSPECIFIEDUNSPECIFIED
Federico, C.università di perugia, italyUNSPECIFIEDUNSPECIFIED
Fink, U.lunar planetary laboratory, univarsity of arizona, tucson, usaUNSPECIFIEDUNSPECIFIED
Fonti, S.dipartimento di fisica, università di lecce, italyUNSPECIFIEDUNSPECIFIED
Ip, W-H.institute for space science, national central university, chung li, taiwanUNSPECIFIEDUNSPECIFIED
Kührt, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Langevin, Y.institut d’astrophisique spatiale, orsay, franceUNSPECIFIEDUNSPECIFIED
Magni, G.inaf/instituto di astrofisica spaziale e fisica cosmica, rome, italyUNSPECIFIEDUNSPECIFIED
McCord, Thomas B.bear fight institute, winthrop, wa, united states.UNSPECIFIEDUNSPECIFIED
Moroz, LiubovUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mottola, S.UNSPECIFIEDhttps://orcid.org/0000-0002-0457-3872UNSPECIFIED
Orofino, V.universita degli studi di lecceUNSPECIFIEDUNSPECIFIED
Schade, U.bessy gmbhUNSPECIFIEDUNSPECIFIED
Taylor, F.W.university of oxfordUNSPECIFIEDUNSPECIFIED
Tiphene, D.despa, observatoire de paris/meudon, 92195 meudon, franceUNSPECIFIEDUNSPECIFIED
Tozzi, G.osservatorio astrofisico di arcetri, firenze, italyUNSPECIFIEDUNSPECIFIED
Beck, P.laboratoire de planétologie de grenoble (lpg) - university joseph fourier grenoble, grenboble, franceUNSPECIFIEDUNSPECIFIED
Biver, Nobservatoire de parisUNSPECIFIEDUNSPECIFIED
Bonal, L.université grenoble alpes, cnrs, institut de planétologie et d’astrophysique de grenoble, grenoble, franceUNSPECIFIEDUNSPECIFIED
Combe, J. P.space science inst., winthrop wa, usa, lab. de planetologie et de geodynamique, u. de nantes, nantes, franceUNSPECIFIEDUNSPECIFIED
Despan, D.laboratoire d’etudes spatiales et d’instrumentation en astrophysique, observatoire de paris/cnrs/université pierre et marie curie/université paris-diderot, meudon, franceUNSPECIFIEDUNSPECIFIED
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, usaUNSPECIFIEDUNSPECIFIED
Formisano, M.inaf-iasf, italyUNSPECIFIEDUNSPECIFIED
Fornasier, S.observatoire de paris-meudon, franceUNSPECIFIEDUNSPECIFIED
Frigeri, A.national institute of astrophysics, rome, italyUNSPECIFIEDUNSPECIFIED
Grassi, D.inaf-ifsi, rome, italyUNSPECIFIEDUNSPECIFIED
Gudipati, M.nasa jet propulsion laboratory, pasadena, ca 91109, usaUNSPECIFIEDUNSPECIFIED
Kappel, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mancarella, F.dipartimento di matematica e fisica "e. de giorgi", università del salento, lecce, italyUNSPECIFIEDUNSPECIFIED
Markus, Kathrinwestfälische wilhelms-universität münsterUNSPECIFIEDUNSPECIFIED
Merlin, F.lesia-observatoire de parisUNSPECIFIEDUNSPECIFIED
Orosei, R.inaf-iasf, rome, italyUNSPECIFIEDUNSPECIFIED
Rinaldi, G.istituto di fisica dello spazio interplanetario (ifsi-inaf), rome - italyUNSPECIFIEDUNSPECIFIED
Cartacci, M.istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italyUNSPECIFIEDUNSPECIFIED
Cicchetti, A.istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italyUNSPECIFIEDUNSPECIFIED
Giuppi, S.ifsiUNSPECIFIEDUNSPECIFIED
Hello, Y.despa, observatoire de paris/meudon, 92195 meudon, franceUNSPECIFIEDUNSPECIFIED
Henry, Florenceobservatoire de paris-meudon, franceUNSPECIFIEDUNSPECIFIED
Jacquinod, S.laboratoire d’etudes spatiales et d’instrumentation en astrophysique, observatoire de paris/cnrs/université pierre et marie curie/université paris-diderot, meudon, franceUNSPECIFIEDUNSPECIFIED
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, franceUNSPECIFIEDUNSPECIFIED
Noschese, R.istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italyUNSPECIFIEDUNSPECIFIED
Politi, R.istituto di astrofisica e planetologia spaziali, istituto nazionale di astrofisica (inaf), rome, italyUNSPECIFIEDUNSPECIFIED
Peter, GisbertUNSPECIFIEDhttps://orcid.org/0000-0001-6101-2513UNSPECIFIED
Date:2016
Journal or Publication Title:Nature
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:529
DOI:10.1038/nature16190
Page Range:pp. 368-372
Publisher:Nature Publishing Group
ISSN:0028-0836
Status:Published
Keywords:Rosetta; comet 67P; water ice; VIRTIS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project ROSETTA Instruments (old), R - Projekt ROSETTA Lander (old)
Location: Berlin-Adlershof
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
Deposited By: Schubert, Renate
Deposited On:10 Nov 2017 12:37
Last Modified:28 Mar 2023 23:49

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