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Regional Surface Morphology of Comet 67P/Churyumov-Gerasimenko from Rosetta/OSIRIS images

El-Maarry, M. R. and Thomas, N. and Giacomini, Lorenza and Massironi, M. and Pajola, M. and Marschall, R. and Gracia-Berná, A. and Sierks, H. and Barbieri, C. and Lamy, P. and Rodrigo, Rafael and Rickman, Hans and Koschny, Detlef and Keller, H. U. and Agarwal, J. and A’Hearn, M. F. and Auger, Anne-Therese and Barucci, M. A. and Bertaux, J.-L. and Bertini, I. and Besse, S. and Bodewits, Dennis and Cremonese, G. and Da Deppo, V. and Davidsson, B. and De Cecco, M. and Debei, S. and Güttler, C. and Fornasier, S. and Fulle, M. and Groussin, Olivier and Gutierrez, P.J. and Hviid, S. and Ip, W-H. and Jorda, L. and Knollenberg, J. and Kovacs, G. and Kramm, J. R. and Kührt, E. and Küppers, Michael and La Forgia, Fiorangela and Lara López, Luisa M. and Lazzarin, M. and Lopez Moreno, J. and Marchi, S. and Marzari, F. and Michalik, H. and Naletto, G. and Oklay, N. and Pommerol, Antoine and Preusker, Frank and Scholten, F. and Tubiana, C. and Vincent, J.B. (2015) Regional Surface Morphology of Comet 67P/Churyumov-Gerasimenko from Rosetta/OSIRIS images. Astronomy and Astrophysics, 583, A26. EDP Sciences. DOI: 10.1051/0004-6361/201525723 ISSN 0004-6361

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Abstract

Aims. The OSIRIS camera onboard the Rosetta spacecraft has been acquiring images of the comet 67P/ Churyumov-Gerasimenko (67P/ C-G)’s nucleus at spatial resolutions down to ~ 0.17 m/px since Aug 2014. These images have yielded unprecedented insight into the morphological diversity of the comet’s surface. This paper presents an overview of the regional morphology of comet 67P/ C-G. Methods. We use the images that were acquired at orbits ~ 20–30 km from the center of the comet to distinguish different regions on the surface and introduce the basic regional nomenclature adopted by all papers in this issue that address the comet’s morphology and surface processes. We use anaglyphs to detect subtle regional and topographical boundaries, and images from close orbit (~ 10 km from the comet’s center) to investigate the fine texture of the surface. Results. Nineteen regions have currently been defined on the nucleus based on morphological and / or structural boundaries and can be grouped into distinctive region types. Consolidated/fractured regions are the most common region type. Some of these regions enclose smooth units that appear to settle in gravitational sinks or topographically low areas. Both comet lobes have a significant portion of their surface covered by a dusty coating that appears to be recently emplaced and shows signs of mobilization by aeolian-like processes. The dusty coatings overlie most of the regions on the surface but are notably absent from a couple of irregular large depressions that show sharp contacts with their surroundings and talus-like deposits in their interiors, which suggests that short-term explosive activity may play a significant role in shaping the comet’s surface in addition to long-term sublimation loss. Finally, the presence of layered brittle units showing signs of mechanical failure predominantly in one of the comet’s lobes can indicate a compositional heterogeneity between the two lobes.

Item URL in elib:https://elib.dlr.de/97030/
Document Type:Article
Title:Regional Surface Morphology of Comet 67P/Churyumov-Gerasimenko from Rosetta/OSIRIS images
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
El-Maarry, M. R.Physikalisches Institut, Sidlerstrasse 5, University of Bern, CH-3012 Bern, Switzerland, mohammed.elmaarry (at) space.unibe.chUNSPECIFIED
Thomas, N.Max-Planck-Institut für Aeronomie, Katlenburg-LindauUNSPECIFIED
Giacomini, LorenzaDipartimento di Geoscienze, University of Padova, via G. Gradenigo 6, 35131 Padova, ItalyUNSPECIFIED
Massironi, M.University of Padova, ItalyUNSPECIFIED
Pajola, M.CISAS - Center for Studies and Activities for Space, University of PadovaUNSPECIFIED
Marschall, R.Physikalisches Institut, Sidlerstrasse 5, University of Bern, CH-3012 Bern, SwitzerlandUNSPECIFIED
Gracia-Berná, A.Physikalisches Institut, Sidlerstrasse 5, University of Bern, CH-3012 Bern, SwitzerlandUNSPECIFIED
Sierks, H.Max-Planck-Institut für Sonnensystemforschung, Göttingen, GermanyUNSPECIFIED
Barbieri, C.University of Padova, Padova, ItalyUNSPECIFIED
Lamy, P.Laboratoire d'Astronomie Spatiale, Marseille, FranceUNSPECIFIED
Rodrigo, RafaelInstituto de Astrofisica de AndaluciaUNSPECIFIED
Rickman, HansUppsala Astronomical ObservatoryUNSPECIFIED
Koschny, DetlefESTEC, The NetherlandsUNSPECIFIED
Keller, H. U.Max Planck Institut f. SonnensystemforschungUNSPECIFIED
Agarwal, J.Max-Planck-Institut für SonnensystemforschungUNSPECIFIED
A’Hearn, M. F.Department for Astronomy, University of MarylandUNSPECIFIED
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
Besse, S.Instituto de Astrofifica de Andalucia-Consejo Superior de Investigaciones Cientificas, Granada, SpainUNSPECIFIED
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
Davidsson, B.Astronomiska observatoriet, Uppsala, SwedenUNSPECIFIED
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
Groussin, OlivierLab. d'Astrophysique de Marseille, FranceUNSPECIFIED
Gutierrez, P.J.IAA-CSIC, Granada, SpainUNSPECIFIED
Hviid, S.stubbe.hviid (at) dlr.deUNSPECIFIED
Ip, W-H.Institute for Space Science, National Central University, Chung Li, TaiwanUNSPECIFIED
Jorda, L.Laboratoire d'Astrophysique de Marseille, FranceUNSPECIFIED
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
La Forgia, FiorangelaUniversity of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
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
Marchi, S.Department of Astronomy, University of PaduaUNSPECIFIED
Marzari, F.Università di Padova, Departimento di Fisica, Padova, ItalyUNSPECIFIED
Michalik, H.Institut für Datentechnik und Kommunikationsnetze (IDA), Technische Universität Braunschweig, Hans-Sommer-Str. 66, 38106 Braunschweig, GermanyUNSPECIFIED
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, F.frank.scholten (at) dlr.deUNSPECIFIED
Tubiana, C.Max-Planck-Institut fuer Sonnensystemforschung, GermanyUNSPECIFIED
Vincent, J.B.Max-Planck-Institut fuer Sonnensystemforschung, GermanyUNSPECIFIED
Date:2015
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:583
DOI :10.1051/0004-6361/201525723
Page Range:A26
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:comet, comet 67P/ Churyumov-Gerasimenko, 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
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geodesy
Deposited By: Bründl, Tara-Marie
Deposited On:08 Dec 2015 13:48
Last Modified:08 Mar 2018 18:54

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