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67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio

dc.contributor.authorAltwegg, K.
dc.contributor.authorBalsiger, H.
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.
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.authorLeRoy, L.
dc.contributor.authorMall, U.
dc.contributor.authorMarty, B.
dc.contributor.authorMousis, O.
dc.contributor.authorNeefs, E.
dc.contributor.authorOwen, T.
dc.contributor.authorReme, H.
dc.contributor.authorRubin, M.
dc.contributor.authorSemon, T.
dc.contributor.authorTzou, C.-T.
dc.contributor.authorWait, H.
dc.contributor.authorWurz, P.
dc.date2015
dc.date.accessioned2016-03-24T12:08:14Z
dc.date.available2016-03-24T12:08:14Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/2790
dc.descriptionThe provenance of water and organic compounds on Earth and other terrestrial planets has been discussed for a long time without reaching a consensus. One of the best means to distinguish between different scenarios is by determining the deuterium-to-hydrogen (D/H) ratios in the reservoirs for comets and Earth’s oceans. Here, we report the direct in situ measurement of the D/H ratio in the Jupiter family comet 67P/Churyumov-Gerasimenko by the ROSINA mass spectrometer aboard the European Space Agency’s Rosetta spacecraft, which is found to be (5.3 ± 0.7) × 10−4—that is, approximately three times the terrestrial value. Previous cometary measurements and our new finding suggest a wide range of D/H ratios in the water within Jupiter family objects and preclude the idea that this reservoir is solely composed of Earth ocean–like water.
dc.languageeng
dc.title67P/Churyumov-Gerasimenko, a Jupiter family comet with a high D/H ratio
dc.typeArticle
dc.subject.frascatiNatural sciences
dc.audienceScientific
dc.source.titleScience
dc.source.volume347
dc.source.issue6220
dc.source.page1261952
Orfeo.peerreviewedYes
dc.identifier.doi10.1126/science.1257377


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