The Open UniversitySkip to content
 

Comet 67P/Churyumov–Gerasimenko: Hardening of the sub-surface layer

Kossacki, Konrad J.; Spohn, T.; Hagermann, A.; Kaufmann, E. and Kührt, E. (2015). Comet 67P/Churyumov–Gerasimenko: Hardening of the sub-surface layer. Icarus, 260 pp. 464–474.

DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.icarus.2015.07.024
Google Scholar: Look up in Google Scholar

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 Type: Journal Item
Copyright Holders: 2015 Elsevier Inc
ISSN: 0019-1035
Project Funding Details:
Funded Project NameProject IDFunding Body
Astronomy and Planetary Sciences at the Open University (SP-12-089-MG)ST/L000776/1STFC (Science & Technology Facilities Council)
Keywords: comets; nucleus; composition; ices
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 44435
Depositing User: Axel Hagermann
Date Deposited: 25 Sep 2015 09:32
Last Modified: 07 Dec 2018 10:35
URI: http://oro.open.ac.uk/id/eprint/44435
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU