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

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

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Metadaten
Author:Matthias LäuterORCiD, Tobias KramerORCiD, Martin RubinORCiD, Kathrin AltweggORCiD
Document Type:Article
Parent Title (English):Monthly Notices of the Royal Astronomical Society
Volume:483
First Page:852
Last Page:861
Publisher:Monthly Notices of the Royal Astronomical Society
Year of first publication:2019
ArXiv Id:http://arxiv.org/abs/1804.06696
Published in:Monthly Notices of the Royal Astronomical Society
DOI:https://doi.org/10.1093/mnras/sty3103
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