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dc.contributor.authorBalsiger, H.
dc.contributor.authorAltwegg, K.
dc.contributor.authorBar-Nun, A.
dc.contributor.authorBerthelier, J.-J.
dc.contributor.authorBieler, A.
dc.contributor.authorBochsler, P.
dc.contributor.authorBriois, C.
dc.contributor.authorCalmonte, U.
dc.contributor.authorCombi, M.
dc.contributor.authorDe Keyser, J.
dc.contributor.authorEberhardt, P.
dc.contributor.authorFiethe, B.
dc.contributor.authorFuselier, S.A.
dc.contributor.authorGasc, S.
dc.contributor.authorGombosi, T.I.
dc.contributor.authorHansen, K.C.
dc.contributor.authorHassig, M.
dc.contributor.authorJackel, A.
dc.contributor.authorKopp, E.
dc.contributor.authorKorth, A.
dc.contributor.authorLe Roy, L.
dc.contributor.authorMall, U.
dc.contributor.authorMarty, B.
dc.contributor.authorMousis, O.
dc.contributor.authorOwen, T.
dc.contributor.authorReme, H.
dc.contributor.authorRubin, M.
dc.contributor.authorSemon, T.
dc.contributor.authorTzou, C.-Y.
dc.contributor.authorWaite, J.H.
dc.contributor.authorWurz, P.
dc.date2015
dc.date.accessioned2016-03-24T09:51:22Z
dc.date.available2016-03-24T09:51:22Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/2699
dc.descriptionComets 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 36Ar and by the 36Ar/38Ar 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.
dc.languageeng
dc.titleDetection of argon in the coma of comet 67P/Churyumov-Gerasimenko
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.source.titleScience Advances
dc.source.volume1
dc.source.issue8
dc.source.pagee1500377
Orfeo.peerreviewedYes
dc.identifier.doi10.1126/sciadv.1500377


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