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Comet 67P/Churyumov-Gerasimenko: Hardening of the subsurface layer

Kossacki, K. and Spohn, Tilman and Hagermann, A. and Kaufmann, E. and Kührt, E. (2015) Comet 67P/Churyumov-Gerasimenko: Hardening of the subsurface layer. Icarus: International Journal of Solar System Studies, 260, pp. 464-474. Elsevier. ISSN 0019-1035

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Abstract

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/98122/
Document Type:Article
Title:Comet 67P/Churyumov-Gerasimenko: Hardening of the subsurface layer
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kossacki, K.University of Warsaw, Warsaw, PolandUNSPECIFIED
Spohn, TilmanTilman.Spohn (at) dlr.deUNSPECIFIED
Hagermann, A.Planetary and Space Sciences Research Institute (PSSRI) Open University, Milton Keynes, UKUNSPECIFIED
Kaufmann, E.The Open University, Milton Keynes, UKUNSPECIFIED
Kührt, E.ekkehard.kuehrt (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:260
Page Range:pp. 464-474
Editors:
EditorsEmail
Nicholson, P. D.UNSPECIFIED
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Churyumov-Gerasimenko, thermische Modellierung, sintern
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
Deposited By: Spohn, Tilman
Deposited On:09 Sep 2015 11:20
Last Modified:01 Dec 2018 19:51

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