Universität zu Köln

Moehlmann, Diedrich, Seidensticker, Klaus J., Fischer, Hans-Herbert, Faber, Claudia, Flandes, Alberto, Knapmeyer, Martin ORCID: 0000-0003-0319-2514, Krueger, Harald, Roll, Reinhard, Scholten, Frank, Thiel, Klaus and Arnold, Walter (2018). Compressive strength and elastic modulus at Agilkia on comet 67P/Churyumov-Gerasimenko derived from the SESAME/CASSE touchdown signals. Icarus, 303. S. 251 - 265. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1090-2643

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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. (C) 2017 The Authors. Published by Elsevier Inc.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Moehlmann, Diedrich UNSPECIFIED UNSPECIFIED UNSPECIFIED Seidensticker, Klaus J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Hans-Herbert UNSPECIFIED UNSPECIFIED UNSPECIFIED Faber, Claudia UNSPECIFIED UNSPECIFIED UNSPECIFIED Flandes, Alberto UNSPECIFIED UNSPECIFIED UNSPECIFIED Knapmeyer, Martin UNSPECIFIED orcid.org/0000-0003-0319-2514 UNSPECIFIED Krueger, Harald UNSPECIFIED UNSPECIFIED UNSPECIFIED Roll, Reinhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Scholten, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Thiel, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Arnold, Walter UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-192665
DOI:	10.1016/j.icarus.2017.09.038
Journal or Publication Title:	Icarus
Volume:	303
Page Range:	S. 251 - 265
Date:	2018
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1090-2643
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ROSETTA LANDER PHILAE; CLOSED-FORM SOLUTION; MECHANICAL-PROPERTIES; TENSILE-STRENGTH; SURFACE; ICE; INDENTATION; COMPOSITES; POROSITY; ALUMINA Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19266