Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/30740
Campo DC | Valore | Lingua |
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dc.contributor.author | Bockelée-Morvan, Dominique | en_US |
dc.contributor.author | Crovisier, J. | en_US |
dc.contributor.author | Erard, S. | en_US |
dc.contributor.author | CAPACCIONI, FABRIZIO | en_US |
dc.contributor.author | Leyrat, C. | en_US |
dc.contributor.author | FILACCHIONE, GIANRICO | en_US |
dc.contributor.author | Drossart, P. | en_US |
dc.contributor.author | Encrenaz, T. | en_US |
dc.contributor.author | Biver, N. | en_US |
dc.contributor.author | DE SANCTIS, MARIA CRISTINA | en_US |
dc.contributor.author | Schmitt, B. | en_US |
dc.contributor.author | Kührt, E. | en_US |
dc.contributor.author | CAPRIA, MARIA TERESA | en_US |
dc.contributor.author | Combes, M. | en_US |
dc.contributor.author | Combi, M. | en_US |
dc.contributor.author | Fougere, N. | en_US |
dc.contributor.author | Arnold, G. | en_US |
dc.contributor.author | Fink, U. | en_US |
dc.contributor.author | Ip, W. | en_US |
dc.contributor.author | MIGLIORINI, Alessandra | en_US |
dc.contributor.author | PICCIONI, GIUSEPPE | en_US |
dc.contributor.author | Tozzi, G. | en_US |
dc.date.accessioned | 2021-04-13T08:02:37Z | - |
dc.date.available | 2021-04-13T08:02:37Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30740 | - |
dc.description.abstract | Infrared observations of the coma of 67P/Churyumov-Gerasimenko were carried out from 2015 July to September, I.e. around perihelion (2015 August 13), with the high-resolution channel of the Visible and Infrared Thermal Imaging Spectrometer instrument onboard Rosetta. We present the analysis of fluorescence emission lines of H<SUB>2</SUB>O, CO<SUB>2</SUB>, <SUP>13</SUP>CO<SUB>2</SUB>, OCS, and CH<SUB>4</SUB> detected in limb sounding with the field of view at 2.7-5 km from the comet centre. Measurements are sampling outgassing from the illuminated Southern hemisphere, as revealed by H<SUB>2</SUB>O and CO<SUB>2</SUB> raster maps, which show anisotropic distributions, aligned along the projected rotation axis. An abrupt increase of water production is observed 6 d after perihelion. In the meantime, CO<SUB>2</SUB>, CH<SUB>4</SUB>, and OCS abundances relative to water increased by a factor of 2 to reach mean values of 32, 0.47, and 0.18 per cent, respectively, averaging post-perihelion data. We interpret these changes as resulting from the erosion of volatile-poor surface layers. Sustained dust ablation due to the sublimation of water ice maintained volatile-rich layers near the surface until at least the end of the considered period, as expected for low thermal inertia surface layers. The large abundance measured for CO<SUB>2</SUB> should be representative of the 67P nucleus original composition, and indicates that 67P is a CO<SUB>2</SUB>-rich comet. Comparison with abundance ratios measured in the Northern hemisphere shows that seasons play an important role in comet outgassing. The low CO<SUB>2</SUB>/H<SUB>2</SUB>O values measured above the illuminated Northern hemisphere are not original, but the result of the devolatilization of the uppermost layers. | en_US |
dc.language.iso | eng | en_US |
dc.title | Evolution of CO2, CH4, and OCS abundances relative to H2O in the coma of comet 67P around perihelion from Rosetta/VIRTIS-H observations | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stw2428 | en_US |
dc.identifier.scopus | 2-s2.0-85012059703 | en_US |
dc.identifier.isi | 000403172000018 | en_US |
dc.identifier.url | http://arxiv.org/abs/1609.07252v1 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/462/Suppl_1/S170/2633384 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 462 | en_US |
dc.relation.issue | Suppl 1 | en_US |
dc.relation.firstpage | S170 | en_US |
dc.relation.lastpage | S183 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 22 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | DEU | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016MNRAS.462S.170B | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.orcid | 0000-0003-1631-4314 | - |
crisitem.author.orcid | 0000-0001-9567-0055 | - |
crisitem.author.orcid | 0000-0002-3463-4437 | - |
crisitem.author.orcid | 0000-0002-9814-9588 | - |
crisitem.author.orcid | 0000-0001-7386-9215 | - |
crisitem.author.orcid | 0000-0002-7893-6808 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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