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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


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
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Seidensticker, Klaus J.UNSPECIFIEDhttps://orcid.org/0000-0003-3671-3769UNSPECIFIED
Fischer, Hans-HerbertUNSPECIFIEDhttps://orcid.org/0000-0003-4887-3911UNSPECIFIED
Flandes, Albertounam, mexikoUNSPECIFIEDUNSPECIFIED
Knapmeyer, MartinUNSPECIFIEDhttps://orcid.org/0000-0003-0319-2514UNSPECIFIED
Krüger, H.max-planck-institute for solar system research, göttingenUNSPECIFIEDUNSPECIFIED
Roll, R.max-planck-institute for solar system research, göttingenUNSPECIFIEDUNSPECIFIED
Thiel, Klausuniversität zu köln, abteilung nuklearchemieUNSPECIFIEDUNSPECIFIED
Arnold, Walteruniv. saarbrücken, univ. göttingenUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:Comet surface material; Compression strength; Elasticity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project ROSETTA Instruments (old), R - Projekt ROSETTA Lander (old)
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:28 Jun 2023 13:12

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