Similarities in element content between comet 67P/Churyumov-Gerasimenko coma dust and selected meteorite samples
Engrand, Cécile; Merouane, Sihane; Paquette, John; Siljeström, Sandra; Varmuza, Kurt; Hilchenbach, Martin; Stenzel, Oliver J.; Brandstätter, Franz; Koeberl, Christian; Ferrière, Ludovic; Filzmoser, Peter
Germany, Austria, France, Sweden
Abstract
We have analysed the element composition and the context of particles collected within the coma of 67P/Churyumov-Gerasimenko with Rosetta's COmetary Secondary Ion Mass Analyzer (COSIMA). A comparison has been made between on board cometary samples and four meteorite samples measured in the laboratory with the COSIMA reference model. Focusing on the rock-forming elements, we have found similarities with chondrite meteorites for some ion count ratios. The composition of 67P/Churyumov-Gerasimenko particles measured by COSIMA shows an enrichment in volatile elements compared to that of the investigated Renazzo (CR2) carbonaceous meteorite sample.