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Long-term survival of surface water ice on comet 67P

Oklay, Nilda and Mottola, Stefano and Vincent, Jean-Baptiste and Pajola, Maurizio and Fornasier, S. and Hviid, Stubbe and Kappel, David and Kührt, Ekkehard and Keller, H. U. and Barucci, M. A. and Feller, Clement and Preusker, Frank and Scholten, Frank and Hall, I. and Sierks, H. and Barbieri, C. and Lamy, Philippe and Rodrigo, R. and Koschny, Detlef and Rickman, Hans and A'Hearn, M. F. and Bertaux, J.-L. and Bertini, Ivano and Bodewits, Dennis and Cremonese, G. and Da Deppo, V. and Davidsson, B. J. R. and Debei, S. and De Cecco, M. and Deller, J. and Deshapriya, J. D. P. and Fulle, M. and Gicquel, A. and Groussin, Olivier and Gutierrez, P. J. and Güttler, Carsten and Hasselmann, Pedro and Hofmann, M. and Ip, W-H. and Jorda, Laurent and Knollenberg, Jörg and Kovacs, Gabor and Kramm, J.-R. and Küppers, M. and Lara, Luisa M. and Lazzarin, Monica and Lin, Zhong-Yi and Lopez Moreno, J. J. and Lucchetti, Alice and Marzari, Francesco and Masoumzadeh, Nafiseh and Naletto, Giampiero and Pommerol, Antoine and Shi, X. and Thomas, N. and Tubiana, Cecilia (2017) Long-term survival of surface water ice on comet 67P. Monthly Notices of the Royal Astronomical Society, 469, S582-S597. Oxford University Press. DOI: 10.1093/mnras/stx2298 ISSN 0035-8711

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Official URL: https://academic.oup.com/mnras/article/469/Suppl_2/S582/4111159/Long-term-survival-of-surface-water-ice-on-comet

Abstract

Numerous water-ice-rich deposits surviving more than several months on comet 67P/Churyumov-Gerasimenko were observed during the Rosetta mission. We announce the first-time detection of water-ice features surviving up to 2 yr since their first observation via OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) NAC (narrow angle camera). Their existence on the nucleus of comet 67P at the arrival of the Rosetta spacecraft suggests that they were exposed to the surface during the comet’s previous orbit. We investigated the temporal variation of large water-ice patches to understand the long-term sustainability of water ice on cometary nuclei on time-scales of months and years. Large clusters are stable over typical periods of 0.5 yr and reduce their size significantly around the comet’s perihelion passage, while small exposures disappear. We characterized the temporal variation of their multispectral signatures. In large clusters, dust jets were detected, whereas in large isolated ones no associated activity was detected. Our thermal analysis shows that the long-term sustainability of water-ice-rich features can be explained by the scarce energy input available at their locations over the first half year. However, the situation reverses for the period lasting several months around perihelion passage. Our two end-member mixing analysis estimates a pure water-ice equivalent thickness up to 15 cm within one isolated patch, and up to 2 m for the one still observable through the end of the mission. Our spectral modelling estimates up to 48 per cent water-ice content for one of the large isolated feature, and up to 25 per cent water ice on the large boulders located within clusters.

Item URL in elib:https://elib.dlr.de/114836/
Document Type:Article
Title:Long-term survival of surface water ice on comet 67P
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Oklay, NildaNilda.OklayVincent (at) dlr.dehttps://orcid.org/0000-0002-4909-9692
Mottola, Stefanostefano.mottola (at) dlr.deUNSPECIFIED
Vincent, Jean-BaptisteJean-Baptiste.Vincent (at) dlr.deUNSPECIFIED
Pajola, Mauriziocentro di ateneo di studi ed attivitá spaziali, “giuseppe colombo” (cisas), university of padova, via venezia 15, 35131 padova, italyUNSPECIFIED
Fornasier, S.observatoire de paris-meudon, franceUNSPECIFIED
Hviid, StubbeStubbe.Hviid (at) dlr.deUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Kührt, EkkehardEkkehard.Kuehrt (at) dlr.deUNSPECIFIED
Keller, H. U.igep tu braunschweigUNSPECIFIED
Barucci, M. A.observatoire de paris, meudon, franceUNSPECIFIED
Feller, Clementlesia, observatoire de paris, cnrs, upmc univ paris 06, univ. paris-diderot, 5 place j. janssen, 92195 meudon pricipal cedex, franceUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Scholten, FrankFrank.Scholten (at) dlr.deUNSPECIFIED
Hall, I.max planck institute for solar system research , katlenburg-lindau, germanyUNSPECIFIED
Sierks, H.max-planck-institut für sonnensystemforschung, göttingen, germanyUNSPECIFIED
Barbieri, C.university of padova, padova, italyUNSPECIFIED
Lamy, Philippelaboratoire d'astrophysique marseilleUNSPECIFIED
Rodrigo, R.international space science institute, hallerstraße 6, 3012 bern, switzerlandUNSPECIFIED
Koschny, Detlefestec, the netherlandsUNSPECIFIED
Rickman, Hansuppsala astronomical observatoryUNSPECIFIED
A'Hearn, M. F.university of maryland, department of astronomy, maryland, usaUNSPECIFIED
Bertaux, J.-L.laboratoire atmosphères, milieux, observations spatiales, cnrs/uvsq/upmc, 11 boulevard d’alembert, 78280 guyancourt, franceUNSPECIFIED
Bertini, Ivanouniversita di padovaUNSPECIFIED
Bodewits, Dennisdepartment of astronomy, university of maryland, college park, md 20742-2421, usaUNSPECIFIED
Cremonese, G.osservatorio astronomico, padova, italyUNSPECIFIED
Da Deppo, V.cnr-ifn uos padova luxor, via trasea 7, 35131 padova, italyUNSPECIFIED
Davidsson, B. J. R.JPLUNSPECIFIED
Debei, S.università di padova, center of studies and activities of space (cisas) "g.colombo", padova, italyUNSPECIFIED
De Cecco, M.università di padova, center of studies and activities of space (cisas) "g.colombo", padova, italyUNSPECIFIED
Deller, J.mpsUNSPECIFIED
Deshapriya, J. D. P.lesiaUNSPECIFIED
Fulle, M.inaf - osservatorio astronomico di trieste, trieste, italyUNSPECIFIED
Gicquel, A.JPLUNSPECIFIED
Groussin, Olivierlab. d'astrophysique de marseille, franceUNSPECIFIED
Gutierrez, P. J.instituto de astrofísica de andalucía – csic, granada, spainUNSPECIFIED
Güttler, Carstenmax-planck-institut für sonnensystemforschung, justus-von-liebig-weg, 3, 37077, göttingen, germanyUNSPECIFIED
Hasselmann, Pedrolesia, observatoire de paris, cnrs, upmc univ paris 06, univ. paris-diderot, 5 place j. janssen, 92195 meudon pricipal cedex, franceUNSPECIFIED
Hofmann, M.max-planck-institut für sonnensystemforschung, göttingen, germanyUNSPECIFIED
Ip, W-H.institute for space science, national central university, chung li, taiwanUNSPECIFIED
Jorda, Laurentlaboratoire d'astrophysique marseilleUNSPECIFIED
Knollenberg, JörgJoerg.Knollenberg (at) dlr.deUNSPECIFIED
Kovacs, Gabormax-planck-institut für sonnensystemforschung, justus-von-liebig-weg, 3, 37077, göttingen, germanyUNSPECIFIED
Kramm, J.-R.max–planck–institut für sonnensystemforschung, justus–von–UNSPECIFIED
Küppers, M.esa/esac, po box 78, 28691 villanueva de la cañada, spainUNSPECIFIED
Lara, Luisa M.iaa-csic granada, spainUNSPECIFIED
Lazzarin, Monicauniversity of padova, department of physics and astronomy, vicolo dell'osservatorio 3, 35122 padova, italyUNSPECIFIED
Lin, Zhong-Yinational central university, graduate institute of astronomy, 300 chung-da rd, chung-li 32054 taiwanUNSPECIFIED
Lopez Moreno, J. J.instituto de astrofísica de andalucía, granada, spainUNSPECIFIED
Lucchetti, Alicecenter of studies and activities for space, cisas, g. colombo, university of padova, via venezia 15, 35131, padova, italyUNSPECIFIED
Marzari, Francescouniversity of padova, padova, italyUNSPECIFIED
Masoumzadeh, Nafisehmax planck institute for solar system research, göttingen, germanyUNSPECIFIED
Naletto, Giampierocentro di ateneo di studi ed attivitá spaziali, “giuseppe colombo” (cisas), university of padova, via venezia 15, 35131 padova, italyUNSPECIFIED
Pommerol, Antoinephysikalisches institut, sidlerstrasse 5, university of bern, 3012, bern, switzerlandUNSPECIFIED
Shi, X.max-planck-institut für sonnensystemforschung, justus-von- liebig-weg, 3 37077 göttingen, germanyUNSPECIFIED
Thomas, N.university of bern, switzerlandUNSPECIFIED
Tubiana, Ceciliampi für sonnensystemforschung, katlenburg-lindau, germanyUNSPECIFIED
Date:11 September 2017
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:469
DOI :10.1093/mnras/stx2298
Page Range:S582-S597
Publisher:Oxford University Press
Series Name:Comets: A new vision after Rosetta and Philae
ISSN:0035-8711
Status:Published
Keywords:methods: data analysis, techniques: image processing, techniques: imaging spectroscopy, comets: individual: 67P/Churyumov-Gerasimenko
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Leitungsbereich PF
Institute of Planetary Research > Planetary Geodesy
Deposited By: Oklay, Dr. Nilda
Deposited On:10 Nov 2017 12:45
Last Modified:06 Sep 2019 15:17

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