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Infrared detection of exposed Carbon Dioxide ice on 67P/CG nucleus surface by Rosetta-VIRTIS

Filacchione, G. and Raponi, A. and Capaccioni, F. and Barucci, Antonella and De Sanctis, M.C. and Fornasier, S. and Ciarniello, M. and Migliorini, A. and Erard, S. and Bockelee-Morvan, D. and Leyrat, C. and Tosi, F. and Piccioni, G. and Palomba, E. and Capria, M. T. and Arnold, Gabriele and Schmitt, B. and Quirico, E. and Taylor, F.W. and Kappel, David (2016) Infrared detection of exposed Carbon Dioxide ice on 67P/CG nucleus surface by Rosetta-VIRTIS. In: Geophysical Research Abstracts, 18, p. 11930. Geophysical Research Abstracts, 17.-22. April 2016, Vienna, Austria.

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Official URL: http://meetingorganizer.copernicus.org/EGU2016/EGU2016-11930.pdf

Abstract

In the period August 2014 - early May 2015 the heliocentric distance of the nucleus of 67P/CG decreased from 3.62 to 1.71 AU and the subsolar point moved towards the southern hemisphere. We investigated the IR spectra obtained by the Rosetta/VIRTIS instrument close to the newly illuminated regions, where colder conditions were present and consequently higher chances to observe highly volatility ices than water. We report about the discovery of CO2 ice identified in a region of the nucleus that recently passed through terminator. The quantitative abundance has been determined by means of spectral modeling of H2O-CO2 icy grains mixed to dark terrains as done in Filacchione et al., Nature, 10.1038/nature16190. The CO2 ice has been identified in an area in Anhur with abundance reaching up to 1.6% mixed with dark terrain. It is interesting to note that CO2 ice has been observed only for a short transient period of time, possibly demonstrating the seasonal nature of the presence of CO2 at the surface. A parallel study on the water and carbon dioxide gaseous emissions in the coma above this volatile-rich area is reported by Migliorini et al., this conference.

Item URL in elib:https://elib.dlr.de/107035/
Document Type:Conference or Workshop Item (Speech)
Title:Infrared detection of exposed Carbon Dioxide ice on 67P/CG nucleus surface by Rosetta-VIRTIS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Filacchione, G.INAF-IASF, Rome, ItalyUNSPECIFIED
Raponi, A.INAF-IASF, ItalyUNSPECIFIED
Capaccioni, F.INAF-IASF, italyUNSPECIFIED
Barucci, AntonellaObservatoire de Paris-Meudon, FranceUNSPECIFIED
De Sanctis, M.C.Istituto Nazionale di Astrofisica, Rome, Italy.UNSPECIFIED
Fornasier, S.Observatoire de Paris-Meudon, FranceUNSPECIFIED
Ciarniello, M.INAF-IASF, ItalyUNSPECIFIED
Migliorini, A.INAF-IASFUNSPECIFIED
Erard, S.LESIAUNSPECIFIED
Bockelee-Morvan, D.Observatoire de Paris, MeudonUNSPECIFIED
Leyrat, C.LESIAUNSPECIFIED
Tosi, F.INAF-IASF Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma ItalyUNSPECIFIED
Piccioni, G.INAF-IASFUNSPECIFIED
Palomba, E.Institute for Interplanetary Space Physics - INAF, Rome, ItalyUNSPECIFIED
Capria, M. T.Instituto di Astrofisica Spaziale e Fisica Cosmica, Roma, ItalyUNSPECIFIED
Arnold, GabrieleGabriele.Arnold (at) dlr.deUNSPECIFIED
Schmitt, B.Grenoble Planetology LaboratoryUNSPECIFIED
Quirico, E.Laboratory of Planetology, CNRS Joseph Fourier UniversityUNSPECIFIED
Taylor, F.W.University of OxfordUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Date:21 April 2016
Journal or Publication Title:Geophysical Research Abstracts
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:18
Page Range:p. 11930
Status:Published
Keywords:VIRTIS, Rosetta, 67P, composition
Event Title:Geophysical Research Abstracts
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:17.-22. April 2016
Organizer:European Geosciences Union
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Institute of Planetary Research > Asteroids and Comets
Deposited By: Kappel, David
Deposited On:25 Oct 2016 11:20
Last Modified:31 Jul 2019 20:04

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