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Mapping of thermal properties of comet 67P/C-G and temporal variations

Leyrat, C. and Tosi, F. and Capaccioni, F. and Erard, S. and Rousseau, Batiste and Filacchione, G. and Capria, M. T. and Desanctis, M.C. and Bockelee-Morvan, D. and Kührt, Ekkehard and Schmitt, B. and Migliorini, A. and Kappel, David (2016) Mapping of thermal properties of comet 67P/C-G and temporal variations. In: Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC), 48, 219.02-219.02. Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC), 16.-21. Oct. 2016, Pasadena, CA, USA.

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Official URL: https://aas.org/meetings/dps48

Abstract

The long-term evolution of the surfaces of comets depends mainly on the erosion rate that is driven by the thermal properties of the regolith and the sub-surface material. Following the diurnal and the seasonal thermal cycles, dust and gas are released progressively, increasing the erosion process. The amount of dust released depends on the surface and subsurface temperatures and thus on thermal inertia and bulk composition.The ESA's Rosetta spacecraft has followed the comet 67P/Churyumov-Gerasimenko over several months from 4 AU to 1.28 AU heliocentric distance, and the VIRTIS/Rosetta imaging infrared spectrometer was capable of detecting the thermal emission of the surface longward of 3 microns.The surface temperature was mapped over a large fraction of the nucleus and was previously used to derive thermal inertia of the main geomorphological units.In this presentation, we now focus on two different aspects: (1) We aim to present a complete detailed map of the thermal inertia by combining measurements of similar areas obtained at different viewing angles ; and (2) we track the evolution of the local thermal properties derived over months when the comet was moving towards perihelion. We then discuss and compare our results with the textural features observed at the surface.

Item URL in elib:https://elib.dlr.de/107190/
Document Type:Conference or Workshop Item (Poster)
Title:Mapping of thermal properties of comet 67P/C-G and temporal variations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Leyrat, C.LESIAUNSPECIFIED
Tosi, F.INAF-IASF Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma ItalyUNSPECIFIED
Capaccioni, F.INAF-IASF, italyUNSPECIFIED
Erard, S.LESIAUNSPECIFIED
Rousseau, BatisteLESIAUNSPECIFIED
Filacchione, G.INAF-IASF, Rome, ItalyUNSPECIFIED
Capria, M. T.Instituto di Astrofisica Spaziale e Fisica Cosmica, Roma, ItalyUNSPECIFIED
Desanctis, M.C.INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma, ItalyUNSPECIFIED
Bockelee-Morvan, D.Observatoire de Paris, MeudonUNSPECIFIED
Kührt, EkkehardEkkehard.Kuehrt (at) dlr.deUNSPECIFIED
Schmitt, B.Grenoble Planetology LaboratoryUNSPECIFIED
Migliorini, A.INAF-IASFUNSPECIFIED
Kappel, DavidDavid.Kappel (at) dlr.deUNSPECIFIED
Date:18 October 2016
Journal or Publication Title:Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC)
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:48
Page Range:219.02-219.02
Status:Published
Keywords:VIRTIS, Rosetta, 67P, Thermal properties
Event Title:Joint 48th meeting of the Division for Planetary Sciences (DPS) and 11th European Planetary Science Congress (EPSC)
Event Location:Pasadena, CA, USA
Event Type:international Conference
Event Dates:16.-21. Oct. 2016
Organizer:American Astronomical Society
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
Institute of Planetary Research > Leitungsbereich PF
Institute of Planetary Research > Asteroids and Comets
Deposited By: Kappel, David
Deposited On:28 Oct 2016 08:54
Last Modified:31 Jul 2019 20:04

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