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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 AuthorsAuthor's ORCID iDORCID Put Code
Mottola, S.UNSPECIFIEDhttps://orcid.org/0000-0002-0457-3872UNSPECIFIED
Neukum, G.Freie Universität Berlin, Institute of Geological Sciences, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Bibring, J.-P.Institute of Space Astrophysics, Orsay, FranceUNSPECIFIEDUNSPECIFIED
Schröder, S.E.UNSPECIFIEDhttps://orcid.org/0000-0003-0323-8324UNSPECIFIED
Hamm, M.German Aerospace Center (DLR), Institute of Planetary Research, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Otto, K.UNSPECIFIEDhttps://orcid.org/0000-0002-0675-1177UNSPECIFIED
Proffe, G.German Aerospace Center (DLR), Institute of Planetary Research, Berlin, GermanyUNSPECIFIEDUNSPECIFIED
Tirsch, DanielaUNSPECIFIEDhttps://orcid.org/0000-0001-5905-5426UNSPECIFIED
Kreslavsky, M.Earth and Planetary Sciences, University of California, Santa Cruz, CA, USAUNSPECIFIEDUNSPECIFIED
Remetean, E.Centre National d'Études Spatiales, Toulouse, FranceUNSPECIFIEDUNSPECIFIED
Souvannavong, F.Magellium, Ramonville, Saint-Agne, FranceUNSPECIFIEDUNSPECIFIED
Dolives, B.Magellium, Ramonville, Saint-Agne, FranceUNSPECIFIEDUNSPECIFIED
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
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 Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project ROSETTA Instruments (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 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:28 Nov 2023 08:41

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