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Regional surface morphology of comet 67P/Churyumov-Gerasimenko from Rosetta/OSIRIS images: The southern hemisphere

El-Maarry, M.R. and Thomas, N. and Gracia-Berná, A. and Pajola, M. and Lee, C. and Massironi, Matteo and Davidsson, B. and Marchi, S. and Keller, H. U. and Hviid, S. and Besse, Sebastien and Sierks, H. and Barbieri, C. and Lamy, P. and Koschny, Detlef and Rickmann, H. and Rodrigo, Rafael and A'Hearn, F. and Auger, Anne-Therese and Barucci, M. A. and Bertaux, J.-L. and Bertini, I. and Bodewits, Dennis and Cremonese, G. and Da Deppo, V. and De Cecco, M. and Debei, S. and Güttler, C. and Fornasier, S. and Fulle, M. and Giacomini, Lorenza and Groussin, Olivier and Gutierrez, P.J. and Ip, W-H. and Jorda, L and Knollenberg, J. and Kovacs, G. and Kramm, J. R. and Kührt, E. and Küppers, Michael and Lara López, Luisa M. and Lazzarin, M. and Lopez Moreno, J. and Marschall, R. and Marzari, F. and Naletto, G. and Oklay, N. and Pommerol, Antoine and Preusker, Frank and Scholten, Frank and Tubiana, C. and Vincent, J.B. (2016) Regional surface morphology of comet 67P/Churyumov-Gerasimenko from Rosetta/OSIRIS images: The southern hemisphere. Astronomy & Astrophysics. EDP Sciences. DOI: 10.1051/0004-6361/201628634 ISSN 0004-6361

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Abstract

The OSIRIS camera on board the Rosetta spacecraft has been acquiring images of the comet 67P/Churyumov-Gerasimenko (67P)’s nucleus since August 2014. Starting in May 2015, the southern hemisphere gradually became illuminated and was imaged for the first time. Here we present the regional morphology of the southern hemisphere, which serves as a companion to an earlier paper that presented the regional morphology of the northern hemisphere. Methods. We used OSIRIS images that were acquired at orbits ~45−125 km from the center of the comet (corresponding to spatial resolutions of ~0.8 to 2.3 m/pixel) coupled with the use of digital terrain models to define the different regions on the surface, and identify structural boundaries accurately. Results. Seven regions have been defined in the southern hemisphere bringing the total number of defined regions on the surface of the nucleus to 26. These classifications are mainly based on morphological and/or topographic boundaries. The southern hemisphere shows a remarkable dichotomy with its northern counterpart mainly because of the absence of wide-scale smooth terrains, dust coatings and large unambiguous depressions. As a result, the southern hemisphere closely resembles previously identified consolidated regions. An assessment of the overall morphology of comet 67P suggests that the comet’s two lobes show surface heterogeneities manifested in different physical/mechanical characteristics, possibly extending to local (i.e., within a single region) scales.

Item URL in elib:https://elib.dlr.de/109877/
Document Type:Article
Title:Regional surface morphology of comet 67P/Churyumov-Gerasimenko from Rosetta/OSIRIS images: The southern hemisphere
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
El-Maarry, M.R.Physikalisches Institut, Sidlerstr. 5, University of Bern, 3012 Bern, SwitzerlandUNSPECIFIED
Thomas, N.max-planck-institut für aeronomie, katlenburg-lindauUNSPECIFIED
Gracia-Berná, A.physikalisches institut, sidlerstrasse 5, university of bern, ch-3012 bern, switzerlandUNSPECIFIED
Pajola, M.cisas - center for studies and activities for space, university of padovaUNSPECIFIED
Lee, C.Centro di Ateneo di Studi ed Attivitá Spaziali, “Giuseppe Colombo” (CISAS), University of Padova, 35131 Padova, ItalyUNSPECIFIED
Massironi, Matteoinaf, padova, iUNSPECIFIED
Davidsson, B.astronomiska observatoriet, uppsala, swedenUNSPECIFIED
Marchi, S.department of astronomy, university of paduaUNSPECIFIED
Keller, H. U.max-planck-institut für sonnensystemforschung, katlenburg-lindauUNSPECIFIED
Hviid, S.stubbe.hviid (at) dlr.deUNSPECIFIED
Besse, Sebastienscientific support office, european space agency, 2201, noordwijk, netherlands.UNSPECIFIED
Sierks, H.max-planck-institut für sonnensystemforschung, katlenburg-lindau, germanyUNSPECIFIED
Barbieri, C.university of padova, padova, italyUNSPECIFIED
Lamy, P.laboratoire d'astronomie spatiale, marseille, franceUNSPECIFIED
Koschny, Detlefestec, the netherlandsUNSPECIFIED
Rickmann, H.pas space research center, bartycka , polandUNSPECIFIED
Rodrigo, Rafaelinstituto de astrofisica de andaluciaUNSPECIFIED
A'Hearn, F.Department of Astronomy, University of Maryland, College Park, MD 20742-2421, USAUNSPECIFIED
Auger, Anne-Thereseaix marseille université, cnrs, laboratoire d’astrophysique de marseille, umr 7326, 38 rue frédéric joliot-curie, 13388 marseille, france.UNSPECIFIED
Barucci, M. A.observatoire de paris, meudon, franceUNSPECIFIED
Bertaux, J.-L.laboratoire atmosphères, milieux, observations spatiales, cnrs/uvsq/upmc, 11 boulevard d’alembert, 78280 guyancourt, franceUNSPECIFIED
Bertini, I.dipartimento di astronomia, università di padova, padova, italyUNSPECIFIED
Bodewits, Dennisdepartment of astronomy, university of maryland, college park, md 20742-2421, usaUNSPECIFIED
Cremonese, G.osservatorio astronomico, padova, italyUNSPECIFIED
Da Deppo, V.consiglio nazionale delle ricerche-istituto nazionale per la fisica della materia, luxor, padova, italyUNSPECIFIED
De Cecco, M.università di padova, center of studies and activities of space (cisas) "g.colombo", padova, italyUNSPECIFIED
Debei, S.università di padova, center of studies and activities of space (cisas) "g.colombo", padova, italyUNSPECIFIED
Güttler, C.max-planck-institut für sonnensystemforschungUNSPECIFIED
Fornasier, S.observatoire de paris-meudon, franceUNSPECIFIED
Fulle, M.inaf - osservatorio astronomico di trieste, trieste, italyUNSPECIFIED
Giacomini, Lorenzadipartimento di geoscienze, university of padova, via g. gradenigo 6, 35131 padova, italyUNSPECIFIED
Groussin, Olivierlab. d'astrophysique de marseille, franceUNSPECIFIED
Gutierrez, P.J.iaa-csic, granada, spainUNSPECIFIED
Ip, W-H.institute for space science, national central university, chung li, taiwanUNSPECIFIED
Jorda, Llam, marseilleUNSPECIFIED
Knollenberg, J.joerg.knollenberg (at) dlr.deUNSPECIFIED
Kovacs, G.max–planck–institut für sonnensystemforschung, justus–von–UNSPECIFIED
Kramm, J. R.max planck institute for solar systems research, katlenburg-lindau, germanyUNSPECIFIED
Kührt, E.ekkehard.kuehrt (at) dlr.deUNSPECIFIED
Küppers, Michaelmax-planck-institut für sonnensystemforschungUNSPECIFIED
Lara López, Luisa M.iaa-csic granada, spainUNSPECIFIED
Lazzarin, M.department of astronomy, university of paduaUNSPECIFIED
Lopez Moreno, J.instituto de astrofifica de andalucia-consejo superior de investigaciones cientificas, granada, spainUNSPECIFIED
Marschall, R.physikalisches institut, university of bern, bern, switzerlandUNSPECIFIED
Marzari, F.università di padova, departimento di fisica, padova, italyUNSPECIFIED
Naletto, G.università di padova, departimento di elettronica et informatica, padova, italyUNSPECIFIED
Oklay, N.max-planck-institut für sonnensystemforschungUNSPECIFIED
Pommerol, Antoinephysikalisches institut, sidlerstrasse 5, university of bern, 3012, bern, switzerlandUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Scholten, Frankfrank.scholten (at) dlr.deUNSPECIFIED
Tubiana, C.max-planck-institut fuer sonnensystemforschung, germanyUNSPECIFIED
Vincent, J.B.max-planck-institut fuer sonnensystemforschung, germanyUNSPECIFIED
Date:2016
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1051/0004-6361/201628634
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:comets: general / comets: individual: 67P/Churyumov-Gerasimenko / methods: observational
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, R - Projekt ROSETTA Lander
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geodesy
Deposited By: Schubert, Renate
Deposited On:21 Dec 2016 08:04
Last Modified:08 Mar 2018 18:23

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