Gas production for 14 species on comet 67P/Churyumov-Gerasimenko from 2014-2016

  • During a two year period between 2014 and 2016 the coma of comet 67P/Churyumov-Gerasimenko (67P/C-G) has been probed by the Rosetta spacecraft. Density data for 14 gas species was recorded with the COmet Pressure Sensor (COPS) and the Double Focusing Mass Spectrometer (DFMS) being two sensors of the ROSINA instrument. The combination with an inverse gas model yields emission rates on each of 3996 surface elements of a surface shape for the cometary nucleus. The temporal evolution of gas production, of relative abundances, and peak productions weeks after perihelion are investigated. Solar irradiation and gas production are in a complex relation revealing features differing for gas species, for mission time, and for the hemispheres of the comet. This characterization of gas composition allows one to correlate 67P/C-G to other solar and interstellar comets, their formation conditions and nucleus properties, see [Bodewits D., et al., 2020 Nature Astronomy].
Author:Matthias Läuter, Tobias Kramer, Martin Rubin, Kathrin Altwegg
Document Type:Proceedings
First Page:EPSC2020-319
Publisher:Europlanet Science Congress
Year of first publication:2020
Published in:Europlanet Science Congress 2020