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

Martin Rubin; Kathrin Altwegg; Hans Balsiger; Akiva Bar-Nun; Jean-Jacques Berthelier; Christelle Briois; Urs Calmonte; Michael Combi; Johan De Keyser; Björn Fiethe; Stephen Fuselier; Sébastien Gasc; Tamas Gombosi; Kenneth Hansen; Ernest Kopp; Axel Korth; Diana Laufer; Léna Le Roy; Urs Mall; Bernard Marty; Olivier Mousis; Tobias Owen; Henri Rème; Thierry Sémon; Chia-Yu Tzou; Jack Waite; Peter Wurz

doi:10.1126/sciadv.aar6297

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

Martin Rubin ¹ Kathrin Altwegg ^{1, 2} Hans Balsiger ¹ Akiva Bar-Nun ³ Jean-Jacques Berthelier ⁴ Christelle Briois ⁵ Urs Calmonte ¹ Michael Combi ⁶ Johan De Keyser ⁷ Björn Fiethe ⁸ Stephen Fuselier ^{9, 10} Sébastien Gasc ¹ Tamas Gombosi ⁶ Kenneth Hansen ⁶ Ernest Kopp ¹ Axel Korth ¹¹ Diana Laufer ¹² Léna Le Roy ¹ Urs Mall ¹¹ Bernard Marty ¹³ Olivier Mousis ¹⁴ Tobias Owen ¹⁵ Henri Rème ¹⁶ Thierry Sémon ¹ Chia-Yu Tzou ¹ Jack Waite ⁸ Peter Wurz ^{2, 1}

1 Physikalisches Institut [Bern]

2 CSH - Center for Space and Habitability

3 Department of Geosciences [Tel Aviv]

4 HEPPI - LATMOS

LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales

5 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace

6 CLaSP - Department of Climate and Space Sciences and Engineering

7 BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique

8 IDA - Institute of Computer and Network Engineering [Braunschweig]

9 Space Science and Engineering Division [San Antonio]

10 UTSA - The University of Texas at San Antonio

11 MPS - Max-Planck-Institut für Sonnensystemforschung

12 Department of Geophysics and Planetary Sciences [Tel Aviv]

13 CRPG - Centre de Recherches Pétrographiques et Géochimiques

14 LAM - Laboratoire d'Astrophysique de Marseille

15 Institute for Astronomy [Honolulu]

16 IRAP - Institut de recherche en astrophysique et planétologie

Abstract : The ROSINA mass spectrometer DFMS on board ESA'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 has been shown 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. Here we show that also krypton exhibits an isotopic composition close to solar. Furthermore, we found a depletion compared to solar of argon with respect to krypton and of krypton with respect to xenon, which is a necessity to postulate an addition of exotic xenon in the comet.

Type de document :

Article dans une revue

Science Advances , American Association for the Advancement of Science (AAAS), 2018, 4 (7), pp.eaar6297. 〈10.1126/sciadv.aar6297〉

Domaine :

Planète et Univers [physics] / Astrophysique [astro-ph]

Liste complète des métadonnées

https://hal-insu.archives-ouvertes.fr/insu-01877545
Contributeur : Catherine Cardon <>
Soumis le : jeudi 20 décembre 2018 - 13:59:20
Dernière modification le : jeudi 7 février 2019 - 17:04:54

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

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