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

H. Balsiger | Zendy; K. Altwegg | Zendy; A. BarNun | Zendy; J. J. Berthelier | Zendy; A. Bieler | Zendy; P. Bochsler | Zendy; Christelle Briois | Zendy; Ursina Calmonte | Zendy; M. R. Combi | Zendy; Johan De Keyser | Zendy; P. Eberhardt | Zendy; Björn Fiethe | Zendy; S. A. Fuselier | Zendy; S. Gasc | Zendy; T. I. Gombosi | Zendy; K. C. Hansen | Zendy; M. Hässig | Zendy; A. Jäckel | Zendy; E. Kopp | Zendy; A. Korth | Zendy; L. Le Roy | Zendy; U. Mall | Zendy; Bernard Marty | Zendy; O. Mousis | Zendy; Tobias Owen | Zendy; H. Rème | Zendy; M. Rubı́n | Zendy; T. Sémon | Zendy; Chia-Yu Tzou | Zendy; J. H. Waite | Zendy; P. Wurz | Zendy

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

Author(s) -

H. Balsiger,

K. Altwegg,

A. BarNun,

J. J. Berthelier,

A. Bieler,

P. Bochsler,

Christelle Briois,

Ursina Calmonte,

M. R. Combi,

Johan De Keyser,

P. Eberhardt,

Björn Fiethe,

S. A. Fuselier,

S. Gasc,

T. I. Gombosi,

K. C. Hansen,

M. Hässig,

A. Jäckel,

E. Kopp,

A. Korth,

L. Le Roy,

U. Mall,

Bernard Marty,

O. Mousis,

Tobias Owen,

H. Rème,

M. Rubı́n,

T. Sémon,

Chia-Yu Tzou,

J. H. Waite,

P. Wurz

Publication year - 2015

Publication title -

science advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.928

H-Index - 146

ISSN - 2375-2548

DOI - 10.1126/sciadv.1500377

Subject(s) - comet , coma (optics) , medicine , astrobiology , physics , astronomy

International audienceComets 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

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