Surface localization of gas sources on comet 67P/Churyumov-Gerasimenko based on DFMS/COPS data

• DOI: 10.1093/mnras/sty3103
• Publication Date: 2018-11-14T07:11:29Z
• Authors: Matthias Läuter; Tobias Kramer; Martin Rubin; Kathrin Altwegg
• Keywords: Orbiter; Coma (optics); On board

We reconstruct the temporal evolution of source distribution for four major gas species H2O, CO2, CO, and O2 on surface comet 67P/Churyumov-Gerasimenko during its 2015 apparition. The analysis applies an inverse coma model fits to data between August 6th 2014 September 5th 2016 measured with Double Focusing Mass Spectrometer (DFMS) Rosetta Orbiter Ion Neutral Analysis (ROSINA) COmet Pressure Sensor (COPS). spatial sources their variation allows one construct maps emissions evaluate integrated productions rates. For all peak production rates per orbit are evaluated separately northern southern hemisphere. nine most active emitting areas comet's defined correlation each is discussed.