Show simple item record

dc.contributor.authorSchroeder, I.R.H.G.
dc.contributor.authorAltwegg, K.
dc.contributor.authorBalsiger, H.
dc.contributor.authorBerthelier, J.J.
dc.contributor.authorDe Keyser, J.
dc.contributor.authorFiethe, B.
dc.contributor.authorFuselier, S.A.
dc.contributor.authorGasc, S.
dc.contributor.authorGombosi, T.I.
dc.contributor.authorRubin, M.
dc.contributor.authorSémon, T.
dc.contributor.authorTzou, C.-Y.
dc.contributor.authorWampfler, S.F.
dc.contributor.authorWurz, P.
dc.contributor.editor
dc.date2019
dc.date.accessioned2019-10-09T08:53:13Z
dc.date.available2019-10-09T08:53:13Z
dc.identifier.urihttps://orfeo.kbr.be/handle/internal/7381
dc.descriptionThe European Space Agency spacecraft Rosetta accompanied the Jupiter-family comet 67P/Churyumov-Gerasimenko for over 2 yr along its trajectory through the inner solar system. Between 2014 and 2016, it performed almost continuous in situ measurements of the comet’s gaseous atmosphere in close proximity to its nucleus. In this study, the 16O/18O ratio of H2O in the coma of 67P/Churyumov-Gerasimenko, as measured by the ROSINA DFMS mass spectrometer onboard Rosetta, was determined from the ratio of H216O/H218O and 16OH/18OH. The value of 445 ± 35 represents an ~11% enrichment of 18O compared with the terrestrial ratio of 498.7 ± 0.1. This cometary value is consistent with the comet containing primordial water, in accordance with leading self-shielding models. These models predict primordial water to be between 5 and 20% enriched in heavier oxygen isotopes compared to terrestrial water.
dc.languageeng
dc.title16O/18O ratio in water in the coma of comet 67P/Churyumov-Gerasimenko measured with the Rosetta/ROSINA double-focusing mass spectrometer
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freecomets
dc.subject.free67P/Churyumov-Gerasimenko
dc.source.titleAstronomy & Astrophysics
dc.source.volume630
dc.source.pageA29
Orfeo.peerreviewedYes
dc.identifier.doi10.1051/0004-6361/201833806


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record