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Comet 67P/Churyumov-Gerasimenko Surface Composition as a Playground for Radiative Transfer Modeling and Laboratory Measurements: an international ISSI team

Ciarniello, M. and Beck, P. and Filacchione, G. and Moroz, Liubov and Pilorget, C. and Pommerol, Antoine and Quirico, E. and Raponi, A. and Schröder, Stefan and Stephan, Katrin and Kappel, David and Vinogradoff, V. and Istiqomah, Istiqomah and Rousseau, Batiste (2017) Comet 67P/Churyumov-Gerasimenko Surface Composition as a Playground for Radiative Transfer Modeling and Laboratory Measurements: an international ISSI team. In: AGU Fall Meeting, P51D-0917-P51D-0917. AGU Fall meeting, 11 Dec - 15 Dec 2017, New Orleans, LA, USA.

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Official URL: https://agu.confex.com/agu/fm17/meetingapp.cgi/Paper/270754

Abstract

Remote sensing observations at visible-infrared (VIS-IR) wavelengths of the nucleus of comet 67P/Churyumov-Gerasimenko performed by VIRTIS (Coradini et al., 2007) aboard the Rosetta mission have revealed a surface ubiquitously covered by low-albedo material (Capaccioni et al., 2015; Ciarniello et al., 2015), characterized by the presence of refractory and semi-volatile organics and dark opaque phases (Capaccioni et al., 2015; Quirico et al., 2016). However, a quantitative determination of the physical properties (grain size, porosity) and chemical composition of the surface regolith, from spectrophotometric analysis, is still missing. This subject will be investigated within an international team hosted by ISSI (International Space Science Institute), taking advantage of available and dedicated laboratory reflectance measurements on cometary analogue samples and radiative transfer models (Hapke, 2012; Shkuratov et al., 1999; Monte Carlo ray-tracing), applied to Rosetta spectrophotometric observations of the nucleus. The convergence between models and measurements will allow us to provide a thorough characterization of 67P/Churyumov-Gerasimenko surface. At the same time, the comparison of theoretical predictions with results from laboratory reflectance spectroscopy on powders of analog materials give us the possibility to constrain the capability of the models to characterize their composition (endmember abundances and mixing modalities) and physical properties. We report about the state of the art of laboratory reflectance spectroscopy and spectral modeling applied to 67P/Churyumov-Gerasimenko VIS-IR spectrum as well as preliminary results of the team activity and planned future work. Acknowledgements: the team thanks ISSI-Switzerland for the logistic and financial support.

Item URL in elib:https://elib.dlr.de/124835/
Document Type:Conference or Workshop Item (Poster)
Title:Comet 67P/Churyumov-Gerasimenko Surface Composition as a Playground for Radiative Transfer Modeling and Laboratory Measurements: an international ISSI team
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ciarniello, M.INAF-IASF, ItalyUNSPECIFIED
Beck, P.Laboratoire de Planétologie de Grenoble (LPG) - University Joseph Fourier Grenoble, Grenboble, FranceUNSPECIFIED
Filacchione, G.INAF-IASF, Rome, ItalyUNSPECIFIED
Moroz, LiubovLjuba.Moroz (at) dlr.deUNSPECIFIED
Pilorget, C.Institut d'Astrophysique Spatiale (IAS), CNRS/Université Paris Sud, Orsay, FranceUNSPECIFIED
Pommerol, AntoinePhysikalisches Institut, Sidlerstrasse 5, University of Bern, 3012, Bern, SwitzerlandUNSPECIFIED
Quirico, E.Grenoble Planetology LaboratoryUNSPECIFIED
Raponi, A.INAF-IASF, ItalyUNSPECIFIED
Schröder, StefanStefanus.Schroeder (at) dlr.dehttps://orcid.org/0000-0003-0323-8324
Stephan, KatrinKatrin.Stephan (at) dlr.deUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.dehttps://orcid.org/0000-0002-0518-5548
Vinogradoff, V.INAF-IASF, ItalyUNSPECIFIED
Istiqomah, IstiqomahLaboratoire de Planétologie de Grenoble (LPG) - University Joseph Fourier Grenoble, Grenboble, FranceUNSPECIFIED
Rousseau, BatisteLESIAUNSPECIFIED
Date:15 December 2017
Journal or Publication Title:AGU Fall Meeting
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:P51D-0917-P51D-0917
Status:Published
Keywords:Comet 67P, Rosetta, VIRTIS, Radiative transfer, Composition
Event Title:AGU Fall meeting
Event Location:New Orleans, LA, USA
Event Type:international Conference
Event Dates:11 Dec - 15 Dec 2017
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
Institute of Planetary Research > Planetary Geology
Deposited By: Kappel, David
Deposited On:12 Dec 2018 12:10
Last Modified:12 Dec 2018 12:10

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