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Comet 67P/Churyumov-Gerasimenko: hardening of the sub-surface layer.

Kossacki, Konrad J. and Spohn, Tilman and Hagermann, A. and Kaufmann, E. and Kuehrt, E. (2015) Comet 67P/Churyumov-Gerasimenko: hardening of the sub-surface layer. Icarus, 260, pp. 464-474. Elsevier. DOI: 10.1016/j.icarus.2015.07.024 ISSN 0019-1035

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Official URL: http://www.sciencedirect.com/science/article/pii/S0019103515003292


From the operation of the MUPUS thermal probe Spohn et al. (2015) concluded that the material of the nucleus of 67P/Churyumov–Gerasimenko is likely to have a high strength, at least locally at the Philae landing site. In this work we consider the derived strength of the material in order to constrain its granulation. For this purpose we performed numerical simulations of the long–term sintering of ice–dust granular mixtures of different granulation, covered by a dust mantle. The dust mantle has a thickness of 0 – 16 cm, and a (pore size and temperature–dependent) thermal conductivity. According to our simulations a hardened layer at least a meter thick forms beneath the dust only when the grains are tens of microns in radius, or smaller.

Item URL in elib:https://elib.dlr.de/97386/
Document Type:Article
Title:Comet 67P/Churyumov-Gerasimenko: hardening of the sub-surface layer.
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kossacki, Konrad J.University of Warsaw, Faculty of Physics, Inst. of Geophysics, Pasteura 7,02-093 Warsaw, Poland, E-mail: kjkossac (at) igf.fuw.edu.plUNSPECIFIED
Spohn, TilmanTilman.Spohn (at) dlr.deUNSPECIFIED
Hagermann, A.The Open University, Milton Keynes, UKUNSPECIFIED
Kaufmann, E.The Open University, Milton Keynes, UKUNSPECIFIED
Kuehrt, E.ekkehard.kuehrt (at) dlr.deUNSPECIFIED
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2015.07.024
Page Range:pp. 464-474
Keywords:Comets; Comets, nucleus; Comets, composition; Ices
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 > Leitungsbereich PF
Institute of Planetary Research > Asteroids and Comets
Deposited By: Bründl, Tara-Marie
Deposited On:22 Oct 2015 15:27
Last Modified:06 Sep 2019 15:26

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