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

Rubin, Martin; Altwegg, Kathrin; Balsiger, Hans; Bar-Nun, Akiva; Berthelier, Jean-Jacques; Briois, Christelle; Calmonte, Ursina Maria; Combi, Michael; De Keyser, Johan; Fiethe, Björn; Fuselier, Stephen A.; Gasc, Sébastien; Gombosi, Tamas I.; Hansen, Kenneth C.; Kopp, Ernest; Korth, Axel; Laufer, Diana; Le Roy, Léna; Mall, Urs; Marty, Bernard; ... (2018). Krypton isotopes and noble gas abundances in the coma of comet 67P/Churyumov-Gerasimenko. Science Advances, 4(7), eaar6297. American Association for the Advancement of Science 10.1126/sciadv.aar6297

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The Rosetta Orbiter Spectrometer for Ion and Neutral Analy sis mass spectrometer Double Focusing Mass Spectrometer on board the European Space Agency ’ s Rosetta spacecraft detected the major isotopes of the noble gases argon, kryp- ton, 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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Other Institutions > Emeriti, Faculty of Science

UniBE Contributor:

Rubin, Martin; Altwegg, Kathrin; Balsiger, Hans; Calmonte, Ursina Maria; Gasc, Sébastien; Kopp, Ernest; Sémon, Thierry; Tzou, Chia-Yu and Wurz, Peter

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

2375-2548

Publisher:

American Association for the Advancement of Science

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

18 Jul 2018 08:03

Last Modified:

22 Jul 2018 02:30

Publisher DOI:

10.1126/sciadv.aar6297

BORIS DOI:

10.7892/boris.118591

URI:

https://boris.unibe.ch/id/eprint/118591

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