Atomic Oxygen Green and Red Emissions in the Comet 67P/Churyumov-Gerasimenko

Wednesday, 16 December 2015
Poster Hall (Moscone South)
Gaël Cessateur1, Kathrin Altwegg2, Ursina Calmonte3, Michael R Combi4, Frederik Dhooghe1, Johan De Keyser1, Stephen A Fuselier5, Andrew Gibbons6, Tamas I Gombosi7, Myrtha Hässig8, Herbert Gunell1, Lena Le Roy9, Romain Maggiolo6, Eddy Neefs6, Martin Rubin2 and Thierry Sémon2, (1)Belgisch Instituut voor Ruimte-Aeronomie, Brussel, Belgium, (2)University of Bern, Bern, Switzerland, (3)Physikalisches Institut, University of Bern, Bern, Switzerland, (4)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (5)Southwest Research Institute, San Antonio, TX, United States, (6)Belgian Institute for Space Aeronomy, Brussels, Belgium, (7)Univ of Michigan, Ann Arbor, MI, United States, (8)Southwest Research Institute San Antonio, San Antonio, TX, United States, (9)University of Bern, Center for Space and Habitability, Bern, Switzerland
The first results of the ESA Rosetta mission, currently near comet 67P/Churyumov-Gerasimenko (67P), have given new insights on cometary formation. In particular, the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) sensor DFMS is studying the composition and evolution of the atmosphere of comet 67P during its trajectory in the solar system.

This contribution will present a coupled chemistry-emission model for atomic oxygen green (557.7 nm) and red-doublet (630, 636.4 nm) emission for comet 67P. We will emphasize on how the Green-to-Red ratio could be impacted by different neutral species within the comet’s atmosphere.