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Lineaments on the Surface of the Consolidated Material of the Comet 67P/Churyumov−Gerasimenko Nucleus

Basilevsky, A.T. und Skorov, Y. und Hviid, S. und Krasilnikov, S.S. und Mall, U. und Keller, H. U. (2018) Lineaments on the Surface of the Consolidated Material of the Comet 67P/Churyumov−Gerasimenko Nucleus. Solar System Research, 52 (6), Seiten 505-517. Springer. doi: 10.1134/S0038094618060011. ISSN 0038-0946.

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Kurzfassung

orphologic analysis of the fragments (500 × 500 pixels) of images of comet 67P/Churyumov−Gerasimenko obtained with the OSIRIS camera for 18 regions, where the consolidated material is exposed on the surface, has been carried out. In terms of resolution, the images form a series from 0.04 to 1.29 m/pixel; consequently, the areas covered by these fragments vary from 400 to ~400 000 m2. In all of the regions, lineaments resembling tension fractures—several dozens of structures per region—are seen; and their number scarcely changes when passing from high-resolution images to lower-resolution ones. It is clear that relatively small lineaments cease to be reliably distinguished when the image resolution worsens, but the largest and well-defined ones remain observable, while the number of larger lineaments grows proportionally to the survey area increasing. Undoubtedly, this is an observational effect, which was demonstrated by examples with an artificially worsened resolution. However, on the other hand, this means that the tension fractures of the consolidated nucleus material represent a hierarchic population of smaller (meters long) to larger (decameters and longer) features. The lineaments seen in the analyzed fragments of images were counted, their lengths were measured, and the spacings (the mean distances between lineaments) and, from them, the depths of penetration of fractures into the nucleus material were estimated. It has been shown that the mean length of lineaments within each studied region depend s on its area (which here correlates with the image resolution) and the depths of fracture penetration into the nucleus body depends on the mean length of lineaments. Both dependences are close to a power law. In the images of four regions covering the areas from 100 000 to 400 000 m2 with a resolution of 0.66−1.29 m/pixel, the structures that look like layering or sheet jointing are seen in addition to fracture lineaments. The tension fractures are apparently formed due to seasonal and diurnal variations of the temperature, while the nature of the formation of the layer-like structures is not yet fully understood.

elib-URL des Eintrags:https://elib.dlr.de/124696/
Dokumentart:Zeitschriftenbeitrag
Titel:Lineaments on the Surface of the Consolidated Material of the Comet 67P/Churyumov−Gerasimenko Nucleus
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Basilevsky, A.T.Vernadsky Institute for Geochemistry and Analytical Chemistry, RAS, Moscow, RussiaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Skorov, Y.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 337077 Göttingen, GermanyNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hviid, S.stubbe.hviid (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Krasilnikov, S.S.Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS, Moscow, RussiaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Mall, U.Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Keller, H. U.horst.keller (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2018
Erschienen in:Solar System Research
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:52
DOI:10.1134/S0038094618060011
Seitenbereich:Seiten 505-517
Verlag:Springer
ISSN:0038-0946
Status:veröffentlicht
Stichwörter:Rosetta 67P Comets Lineaments, consolidated material, fracture, spacing, nucleus
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erforschung des Weltraums
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):R - Projekt ROSETTA Instrumente (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Asteroiden und Kometen
Hinterlegt von: Hviid, Stubbe
Hinterlegt am:10 Dez 2018 14:22
Letzte Änderung:06 Sep 2019 15:17

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