Xenon isotopes in 67P/Churyumov-Gerasimenko show that comets contributed to Earth's atmosphere

Marty, B.; Altwegg, Kathrin; Balsiger, Hans; Bar-Nun, A.; Bekaert, D. V.; Berthelier, J.-J.; Bieler, André; Briois, C.; Calmonte, Ursina Maria; Combi, M.; De Keyser, J.; Fiethe, B.; Fuselier, S. A.; Gasc, Sébastien; Gombosi, T. I.; Hansen, K. C.; Hässig, M.; Jäckel, Annette; Kopp, Ernest; Korth, A.; ... (2017). Xenon isotopes in 67P/Churyumov-Gerasimenko show that comets contributed to Earth's atmosphere. Science, 356(6342), pp. 1069-1072. American Association for the Advancement of Science 10.1126/science.aal3496

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The origin of cometary matter and the potential contribution of comets to inner-planet atmospheres are long-standing problems. During a series of dedicated low-altitude orbits, the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) on the Rosetta spacecraft analyzed the isotopes of xenon in the coma of comet 67P/Churyumov-Gerasimenko. The xenon isotopic composition shows deficits in heavy xenon isotopes and matches that of a primordial atmospheric component. The present-day Earth atmosphere contains 22 ± 5% cometary xenon, in addition to chondritic (or solar) xenon.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Departement of Chemistry and Biochemistry
08 Faculty of Science > Other Institutions > Emeriti, Faculty of Science
08 Faculty of Science > Physics Institute
10 Strategic Research Centers > Center for Space and Habitability (CSH)

UniBE Contributor:

Altwegg, Kathrin; Balsiger, Hans; Bieler, André; Calmonte, Ursina Maria; Gasc, Sébastien; Hässig, M.; Jäckel, Annette; Kopp, Ernest; Le Roy, Léna; Rème, H.; Rubin, Martin; Sémon, Thierry; Tzou, Chia-Yu and Wurz, Peter

Subjects:

500 Science > 520 Astronomy
500 Science > 530 Physics
500 Science > 540 Chemistry
600 Technology > 620 Engineering

ISSN:

0036-8075

Publisher:

American Association for the Advancement of Science

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

16 Oct 2017 09:07

Last Modified:

16 Oct 2017 09:07

Publisher DOI:

10.1126/science.aal3496

BORIS DOI:

10.7892/boris.105650

URI:

https://boris.unibe.ch/id/eprint/105650

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