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Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko

dc.contributor.authorHassig, M.
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.A.
dc.contributor.authorGaland, M.
dc.contributor.authorGasc, S.
dc.contributor.authorGombosi, T.I.
dc.contributor.authorHansen, K.C.
dc.contributor.authorJackel, A.
dc.contributor.authorKeller, H.U.
dc.contributor.authorKopp, E.
dc.contributor.authorKorth, A.
dc.contributor.authorKuhrt, E.
dc.contributor.authorLe Roy, 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.authorTornow, C.
dc.contributor.authorTzou, C.-Y.
dc.contributor.authorWaite, J.H.
dc.contributor.authorWurz, P.
dc.date2015
dc.date.accessioned2016-03-24T10:07:59Z
dc.date.available2016-03-24T10:07:59Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/2708
dc.descriptionComets contain the best-preserved material from the beginning of our planetary system. Their nuclei and comae composition reveal clues about physical and chemical conditions during the early solar system when comets formed. ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) onboard the Rosetta spacecraft has measured the coma composition of comet 67P/Churyumov-Gerasimenko with well-sampled time resolution per rotation. Measurements were made over many comet rotation periods and a wide range of latitudes. These measurements show large fluctuations in composition in a heterogeneous coma that has diurnal and possibly seasonal variations in the major outgassing species: water, carbon monoxide, and carbon dioxide. These results indicate a complex coma-nucleus relationship where seasonal variations may be driven by temperature differences just below the comet surface.
dc.languageeng
dc.titleTime variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freecarbon
dc.subject.freecarbon dioxide
dc.subject.freewater
dc.subject.freecomet
dc.subject.freeextraterrestrial matter
dc.subject.freeheterogeneity
dc.subject.freeseasonal variation
dc.subject.freetemporal variation
dc.subject.freeArticle
dc.subject.freeastronomy
dc.subject.freecosmological phenomena
dc.subject.freeenvironmental temperature
dc.subject.freepriority journal
dc.subject.freeseasonal variation
dc.subject.freespace flight
dc.subject.freespectrometer
dc.subject.freetime
dc.source.titleScience
dc.source.volume347
dc.source.issue6220
dc.source.pageA0276
Orfeo.peerreviewedYes
dc.identifier.doi10.1126/science.aaa0276
dc.identifier.scopus2-s2.0-84921811234


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