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Journal Article

Krypton isotopes and noble gas abundances in the coma of comet 67P/Churyumov-Gerasimenko

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Korth,  Axel
Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;

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Mall,  Urs
Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;

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Citation

Rubin, M., Altwegg, K., Balsiger, H., Bar-Nun, A., Berthelier, J.-J., Briois, C., et al. (2018). Krypton isotopes and noble gas abundances in the coma of comet 67P/Churyumov-Gerasimenko. Science Advances, 4(7): eaar6297. doi:10.1126/sciadv.aar6297.


Cite as: https://hdl.handle.net/21.11116/0000-0003-C388-7
Abstract
The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis mass spectrometer Double Focusing Mass Spectrometer on board the European Space Agency’s Rosetta spacecraft detected the major isotopes of the noble gases argon, krypton, and xenon in the coma of comet 67P/Churyumov-Gerasimenko. Earlier, it was found that xenon exhibits an isotopic composition distinct from anywhere else in the solar system. However, argon isotopes, within error, were shown to be consistent with solar isotope abundances. This discrepancy suggested an additional exotic component of xenon in comet 67P/Churyumov-Gerasimenko. We show that krypton also exhibits an isotopic composition close to solar. Furthermore, we found the argon to krypton and the krypton to xenon ratios in the comet to be lower than solar, which is a necessity to postulate an addition of exotic xenon in the comet.