A first assessment of the strength of cometary particles collected in-situ by the COSIMA instrument onboard ROSETTA



: Hornung K, Merouane S, Hilchenbach M, Langevin Y, Mellado EM, Della Corte V, Kissel J, Engrand C, Schulz R, Ryno J, Silen J, Group Author(s): COSIMA Team

Publisher: PERGAMON-ELSEVIER SCIENCE LTD

: 2016

: Planetary and Space Science

: PLANETARY AND SPACE SCIENCE

: PLANET SPACE SCI

: 133

: 63

: 75

: 13

: 0032-0633

DOI: https://doi.org/10.1016/j.pss.2016.07.003

: http://dx.doi.org/10.1016/j.pss.2016.07.003


Soon after the arrival of the ROSETTA spacecraft at Comet 67/P Churyumov-Gerasimenko the onboard instrument COSIMA ("Cometary Secondary Ion Mass Analyzer") collected a large number of cometary dust particles on targets from gold black of thickness between 10 and 30 mu m. Inspection by its camera subsystem revealed that many of them consist of smaller units of typically some tens of micrometers in size. The collection process left the smaller dust particles in an essentially unaltered state whereas most particles larger than about 100 mu m got fragmented into smaller pieces. Using the observed fragment size distributions, the present paper includes a first assessment of the strength for those dust particles that were disrupted upon impact. (C) 2016 Elsevier Ltd. All rights reserved.



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