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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kofman, Wlodek W.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2017 Interior of 67P/C-G comet as seen by CONSERT bistatic radar on Rosetta
- 2016Cosmochemical implications of CONSERT permittivity characterization of 67P/CG
- 2016An interpretation of the CONSERT and SESAME-PP results based on new permittivity measurements of porous water ice and ice-basaltic/organic dust mixtures suggests an increase of porosity with depth in 67P
- 2016Looking at Comet 67P Sub-surface in the Vicinity of Abydos
- 2016Characterizing the interior of 67P in the vicinity of Abydos
- 2016Cosmochemical implications of CONSERT permittivity characterization of 67P/C-G
- 2016Heterogeneities of 67P nucleus seen by CONSERT in the vicinity of Abydos
- 2016Mineralogical Implications of CONSERT Permittivity Characterization of 67P
- 2016Effect of meter-scale heterogeneities inside 67P nucleus on CONSERT data
- 2015Insights gained from Data Measured by the CONSERT Instrument during Philae's Descent onto 67P/C-G's surface
- 2015Broadband permittivity measurements on porous planetary regoliths simulants, in relation with the Rosetta mission to 67P/C-G
- 2015CONSERT Radar Investigations of the Shallow Subsurface of Comet 67P, in the Vicinity of the Philae Lander
- 2015Broadband Permittivity Measurements on Porous Planetary Soil Simulants, in Relation with the Rosetta Mission
- 2015The CONSERT Instrument during Philae's Descent onto 67P/C-G’s surface: Insights on Philae’s Attitude and the Surface Permittivity Measurements at the Agilkia-Landing-Site
- 2015Revealing the Possible Existence of a Near-Surface Gradient in Local Properties of 67P/Churyumov-Gerasimenko Nucleus Through CONSERT Measurements
- 2015The interior of 67P/C-G nucleus revealed by CONSERT measurements and simulations
- 2014Revealing the properties of Chuyurmov-Gerasimenko's shallow sub-surface through CONSERT's measurements at grazing angles
- 2009Comet nuclei primordial aggregation effects on their internal structure
- 2008Imaging of the Internal Structure of Comet 67P/Churyumov-Gerasimenko from Radiotomography CONSERT Data (Rosetta Mission) through spectral techniques
- 2008Comet nuclei aggregation and thermal simulations to prepare the Rosetta mission
- 2007Imaging of the Internal Structure of Comet 67P/Churyumov-Gerasimenko from Radiotomography CONSERT Data by Using Grid Computing Techniques (Rosetta Mission).
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document
Comet nuclei aggregation and thermal simulations to prepare the Rosetta mission
Abstract
The international Rosetta mission will study in depth 67P/Churyumov-Gerasimenko's nucleus global structure and the onset of its activity during the pre-perihelion phase. Numerical simulations towards realistic models of comet nuclei will facilitate the inversion procedures and the interpretation of the data obtained during the rendez-vous of the mission. New aspects of comet nuclei formation and evolution simulations have been developed by our teams to better describe the physical processes of the origins and evolution of these small bodies. Cometesimal aggregation simulations taking into account the evolution of the cohesive energy by sintering processes during accretion in the Kuiper belt can be used to interpret the layered structure and surface features observed for previous comets [1] and quantify the tensile strengths of these objects. Simulations have been done using up to 50000 cometesimals with sizes ranging from tens to hundreds of meters. A layering of the cohesive strength of the comet nuclei material naturally occurs leading to the presence of a high cohesive core surrounded by less cohesive outer layers. Thermal evolution models of comet nuclei have been rather successful in describing the more recent evolution of these objects. A new quasi-3D approach for non-spherically shaped comet nuclei has been developed for the case of 67P/Churyumov-Gerasimenko's nucleus to analyse the effect of irregular shapes (non-spherical, mountain-like and depression-like features) on its thermal evolution, on the local dust crust formation and the onset of its activity [2]. The results of such simulations are used to derive generic cometary nuclei models to be implemented in the analyses processes of the CONSERT experiment on-board Rosetta that will study the internal dielectric properties and heterogeneities of the nucleus. Support from CNES and Europlanet is acknowledged. [1] Belton et al., Icarus 187, 332 (2007) [2] Lasue et al., PSS, submitted.