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The structure of the regolith on 67P/Churyumov-Gerasimenko from ROLIS descent imaging

Mottola, S. and Arnold, Gabriele and Grothues, H.-G. and Jaumann, R. and Michaelis, Harald and Neukum, G. and Bibring, J.-P. and Schröder, S.E. and Hamm, M. and Otto, K. and Pelivan, Ivanka and Proffe, G. and Scholten, F. and Tirsch, Daniela and Kreslavsky, M. and Remetean, E. and Souvannavong, F. and Dolives, B. (2015) The structure of the regolith on 67P/Churyumov-Gerasimenko from ROLIS descent imaging. Science, 349 (6247), aab0232-1. American Association for the Advancement of Science (AAAS). DOI: 10.1126/science.aab0232 ISSN 0036-8075

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Official URL: http://www.sciencemag.org/content/349/6247/aab0232.full.pdf


The structure of the upper layer of a comet is a product of its surface activity. The Rosetta Lander Imaging System (ROLIS) on board Philae acquired close-range images of the Agilkia site during its descent onto comet 67P/Churyumov-Gerasimenko. These images reveal a photometrically uniform surface covered by regolith composed of debris and blocks ranging in size from centimeters to 5 meters. At the highest resolution of 1 centimeter per pixel, the surface appears granular, with no apparent deposits of unresolved sand-sized particles. The thickness of the regolith varies across the imaged field from 0 to 1 to 2 meters. The presence of aeolian-like features resembling wind tails hints at regolith mobilization and erosion processes. Modeling suggests that abrasion driven by airfall-induced particle “splashing” is responsible for the observed formations.

Item URL in elib:https://elib.dlr.de/97820/
Document Type:Article
Title:The structure of the regolith on 67P/Churyumov-Gerasimenko from ROLIS descent imaging
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mottola, S.stefano.mottola (at) dlr.deUNSPECIFIED
Arnold, GabrieleGabriele.Arnold (at) dlr.deUNSPECIFIED
Grothues, H.-G.HG.grothues (at) dlr.deUNSPECIFIED
Jaumann, R.ralf.jaumann (at) dlr.deUNSPECIFIED
Michaelis, Haraldharald.michaelis (at) dlr.deUNSPECIFIED
Neukum, G.Freie Universität Berlin, Institute of Geological Sciences, Berlin, GermanyUNSPECIFIED
Bibring, J.-P.Institute of Space Astrophysics, Orsay, FranceUNSPECIFIED
Schröder, S.E.stefanus.schroeder (at) dlr.deUNSPECIFIED
Hamm, M.German Aerospace Center (DLR), Institute of Planetary Research, Berlin, GermanyUNSPECIFIED
Otto, K.katharina.otto (at) dlr.deUNSPECIFIED
Pelivan, Ivankaivanka.pelivan (at) dlr.deUNSPECIFIED
Proffe, G.German Aerospace Center (DLR), Institute of Planetary Research, Berlin, GermanyUNSPECIFIED
Scholten, F.frank.scholten (at) dlr.deUNSPECIFIED
Tirsch, DanielaDaniela.Tirsch (at) dlr.deUNSPECIFIED
Kreslavsky, M.Earth and Planetary Sciences, University of California, Santa Cruz, CA, USAUNSPECIFIED
Remetean, E.Centre National d'Études Spatiales, Toulouse, FranceUNSPECIFIED
Souvannavong, F.Magellium, Ramonville, Saint-Agne, FranceUNSPECIFIED
Dolives, B.Magellium, Ramonville, Saint-Agne, FranceUNSPECIFIED
Date:31 July 2015
Journal or Publication Title:Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1126/science.aab0232
Page Range:aab0232-1
Publisher:American Association for the Advancement of Science (AAAS)
Keywords:67P, ROLIS, regolith, comet, descent imaging, splashing
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 Geology
Institute of Planetary Research > Planetary Sensor Systems
Institute of Planetary Research > Planetary Geodesy
Member of the Space Administration
Deposited By: Bründl, Tara-Marie
Deposited On:04 Sep 2015 08:10
Last Modified:08 Mar 2018 18:51

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