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Compressive strength and elastic modulus at Agilkia on comet 67P/Churyumov-Gerasimenko derived from the SESAME/CASSE touchdown signals

Möhlmann, Diedrich and Seidensticker, Klaus J. and Fischer, Hans-Herbert and Faber, Claudia and Flandes, Alberto and Knapmeyer, Martin and Krüger, H. and Roll, R. and Scholten, Frank and Thiel, Klaus and Arnold, Walter (2017) Compressive strength and elastic modulus at Agilkia on comet 67P/Churyumov-Gerasimenko derived from the SESAME/CASSE touchdown signals. Icarus: International Journal of Solar System Studies. Elsevier. DOI: 10.1016/j.icarus.2017.09.038 ISSN 0019-1035

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Official URL: https://www.sciencedirect.com/science/article/pii/S0019103517300994

Abstract

We report an analysis of the Comet Acoustic Surface Sounding Experiment (CASSE) acceleration signals at Philae's first touchdown site Agilkia on comet 67P/Churyumov-Gerasimenko. The signals yield the forces in the contact zone foot-sole and comet surface, and from these forces a compression strength of approximately 10 kPa can be derived. The sole's contact-resonances provide an elastic modulus of the order of 10 MPa. Our results are partially based on calibration experiments, which are described in the appendix of the current paper. Relations known in material science, linking porosity to elasticity and fracture energy, allow one to check the interdependence between compression strength and elasticity.

Item URL in elib:https://elib.dlr.de/116633/
Document Type:Article
Additional Information:Bisher nur online erschienen.
Title:Compressive strength and elastic modulus at Agilkia on comet 67P/Churyumov-Gerasimenko derived from the SESAME/CASSE touchdown signals
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Möhlmann, DiedrichUNSPECIFIEDUNSPECIFIED
Seidensticker, Klaus J.Klaus.Seidensticker (at) dlr.dehttps://orcid.org/0000-0003-3671-3769
Fischer, Hans-HerbertHans-Herbert.Fischer (at) dlr.dehttps://orcid.org/0000-0003-4887-3911
Faber, Claudiaclaudia.faber (at) dlr.deUNSPECIFIED
Flandes, Albertounam, mexikoUNSPECIFIED
Knapmeyer, MartinMartin.Knapmeyer (at) dlr.dehttps://orcid.org/0000-0003-0319-2514
Krüger, H.max-planck-institute for solar system research, göttingenUNSPECIFIED
Roll, R.max-planck-institute for solar system research, göttingenUNSPECIFIED
Scholten, FrankFrank.Scholten (at) dlr.deUNSPECIFIED
Thiel, Klausuniversität zu köln, abteilung nuklearchemieUNSPECIFIED
Arnold, Walteruniv. saarbrücken, univ. göttingenUNSPECIFIED
Date:2017
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.icarus.2017.09.038
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Comet surface material; Compression strength; Elasticity
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, R - Projekt ROSETTA Lander
Location: Berlin-Charlottenburg , Köln-Porz
Institutes and Institutions:Institute of Planetary Research > Planetary Geodesy
Institute of Planetary Research > Leitungsbereich PF
Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Physics
Space Operations and Astronaut Training > User center for space experiments (MUSC)
Deposited By: Weiland, Marianne
Deposited On:05 Dec 2017 15:17
Last Modified:01 Jan 2020 03:00

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