Detection of argon in the coma of comet 67P/Churyumov-Gerasimenko

Abstract : Comets have been considered to be representative of icy planetesimals that may have contributed a significant fraction of the volatile inventory of the terrestrial planets. For example, comets must have brought some water to Earth. However, the magnitude of their contribution is still debated. We report the detection of argon and its relation to the water abundance in the Jupiter family comet 67P/Churyumov-Gerasimenko by in situ measurement of the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) mass spectrometer aboard the Rosetta spacecraft. Despite the very low intensity of the signal, argon is clearly identified by the exact determination of the mass of the isotope 36 Ar and by the 36 Ar/ 38 Ar ratio. Because of time variability and spatial heterogeneity of the coma, only a range of the relative abundance of argon to water can be given. Nevertheless, this range confirms that comets of the type 67P/Churyumov-Gerasimenko cannot be the major source of Earth's major volatiles.
Liste complète des métadonnées

Cited literature [20 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01346022
Contributor : Bernard Marty <>
Submitted on : Wednesday, July 20, 2016 - 4:16:44 PM
Last modification on : Friday, April 12, 2019 - 4:23:22 PM
Document(s) archivé(s) le : Friday, October 21, 2016 - 10:21:36 AM

File

Argon Balsiger Science Advance...
Publisher files allowed on an open archive

Identifiers

Citation

Hans Balsiger, Kathrin Altwegg, Akiva Bar-Nun, Jean-Jacques Berthelier, Andre Bieler, et al.. Detection of argon in the coma of comet 67P/Churyumov-Gerasimenko. Science Advances , American Association for the Advancement of Science (AAAS), 2015, 1 (8), pp.E1500377 ⟨10.1126/sciadv.1500377⟩. ⟨hal-01346022⟩

Share

Metrics

Record views

1704

Files downloads

184