H/C elemental ratios of the refractory organic matter in cometary particles of 67P/Churyumov-Gerasimenko

Robin Isnard (1, 2) , Anaïs Bardyn , Nicolas Fray (1) , Christelle Briois (2) , Hervé Cottin (1) , John Paquette , Oliver Stenzel , Conel Alexander , Donia Baklouti (3) , Cécile Engrand (4) , François-Régis Orthous-Daunay (5) , Sandra Siljeström , Kurt Varmuza , Martin Hilchenbach

1 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
2 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
3 IAS - Institut d'astrophysique spatiale
4 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
5 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble

For two years, the time-of-flight secondary ion mass spectrometer COSIMA (COmetary Secondary Ion Mass Analyzer), on board the Rosetta orbiter, performed in situ analyses of the dust particles ejected from the comet 67P/ChuryumovGerasimenko. Exploiting different analyses of organic analogs that have been analyzed via the COSIMA reference model, we are now able to estimate the H/C elemental ratio of the 67P cometary particles.

Domains: Sciences of the Universe [physics]

Robin Isnard, Anaïs Bardyn, Nicolas Fray, Christelle Briois, Hervé Cottin, et al.. H/C elemental ratios of the refractory organic matter in cometary particles of 67P/Churyumov-Gerasimenko. European Planetary Science Congress 2018, Sep 2018, Berlin, Germany. 18 pp. ⟨insu-03565618⟩