The global surface composition of 67P/Churyumov-Gerasimenko nucleus by Rosetta/VIRTIS. II) Diurnal and seasonal variability
| العنوان: | The global surface composition of 67P/Churyumov-Gerasimenko nucleus by Rosetta/VIRTIS. II) Diurnal and seasonal variability |
|---|---|
| المؤلفون: | M. A. Barucci, Stefano Mottola, Alessandra Migliorini, Federico Tosi, Gabriele Arnold, Priscilla Cerroni, Andrea Longobardo, M. T. Capria, Giovanna Rinaldi, M. Salatti, Bernard Schmitt, Andrea Raponi, W-H. Ip, Angelo Zinzi, Mauro Ciarniello, C. Leyrat, Giuseppe Piccioni, Batiste Rousseau, David Kappel, Fabrizio Capaccioni, Eric Quirico, Stéphane Erard, Gianrico Filacchione, Ernesto Palomba, E. Kuehrt, D. Bockelee-Morvan, M.C. Desanctis |
| المساهمون: | ITA, FRA, DEU, TWN, SGP, Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Istituto di Astrofisica Spaziale e Fisica cosmica - Roma (IASF-Roma), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Laboratoire de Chimie Physique D'Orsay (LCPO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), German Aerospace Center (DLR), Agenzia Spaziale Italiana (ASI), Space Science Institute [Macau] (SSI), Macau University of Science and Technology (MUST), IASI (IASI), Consiglio Nazionale delle Ricerche (CNR), Université Paris-Sud - Paris 11 (UP11)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR) |
| المصدر: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2016, 462 (Issue Suppl_1), pp.S443-S458. ⟨10.1093/mnras/stw3177⟩ Monthly Notices of the Royal Astronomical Society, 2016, 462 (Issue Suppl_1), pp.S443-S458. ⟨10.1093/mnras/stw3177⟩ |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 67P/Churyumov-Gerasimenko, Asteroiden und Kometen, 010504 meteorology & atmospheric sciences, Infrared, imaging spectroscopy, Atmospheric sciences, 01 natural sciences, Spectral line, Diurnal cycle, 0103 physical sciences, Radiative transfer, comets, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Sunlight, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Leitungsbereich PF, comets: individual: 67P/Churyumov-Gerasimenko, Astronomy and Astrophysics, methods: data analysis, 13. Climate action, Space and Planetary Science, techniques: imaging spectroscopy, [SDU]Sciences of the Universe [physics], radiative transfer, Spatial ecology, Sublimation (phase transition), Surface water, padc |
| الوصف: | International audience; VIRTIS-M observations of the nucleus of comet 67P/Churyumov-Gerasimenko acquired from 2014 August to 2015 May have been analysed to investigate surface temporal variability at both seasonal and diurnal scales. The measured reflectance spectra are studied by means of comet spectral indicators (CSI) such as slopes in the visible and infrared ranges, and 3.2 mum band area and band centre. CSI maps derived from data acquired at different heliocentric distances (from 3.62 to 1.72 au) along the inbound leg of the comet's orbit are used to infer surface water ice abundance. We measure a global scale enrichment of water ice from 2014 August to 2015 May across the body of the comet, along with variability at small spatial scale, possibly related with the local insolation conditions. Analysis of water ice diurnal variability is performed on 2014 August observations. Water ice appears at the border of receding shadows in the neck of the comet (Hapi), sublimating in less than 1 h, after exposure to sunlight. As similar variability is not observed in other regions of the comet, we interpreted this as the expression of a diurnal cycle of sublimation and re-condensation of water ice, triggered by sudden shadowing produced on the neck by the body and the head of the nucleus. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0035-8711 1365-2966 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d898fb378b925fb7d4a7c5d1b2decff8 https://doi.org/10.1093/mnras/stw3177 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....d898fb378b925fb7d4a7c5d1b2decff8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00358711 13652966 |
|---|