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  A three-dimensional modelling of the layered structure of comet 67P/Churyumov-Gerasimenko

Penasa, L., Massironi, M., Naletto, G., Simioni, E., Ferrari, S., Pajola, M., et al. (2017). A three-dimensional modelling of the layered structure of comet 67P/Churyumov-Gerasimenko. Monthly Notices of the Royal Astronomical Society, 469(Suppl. 2), S741-S754. doi:10.1093/mnras/stx2899.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-A42F-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-218B-7
Genre: Journal Article

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Penasa, L, Author
Massironi, M, Author
Naletto, G, Author
Simioni, E, Author
Ferrari, S, Author
Pajola, M, Author
Lucchetti, A, Author
Preusker, F, Author
Scholten, F, Author
Jorda, L, Author
Gaskell, R, Author
Ferri, F, Author
Marzari, F, Author
Davidsson, B, Author
Mottola, S, Author
Sierks, Holger1, Author              
Barbieri, C, Author
Lamy, P L, Author
Rodrigo, R, Author
Koschny, D, Author
Rickman, H, AuthorKeller, H U, AuthorAgarwal, Jessica1, Author              A’Hearn, M F, AuthorBarucci, M A, AuthorBertaux, J L, AuthorBertini, I, AuthorCremonese, G, AuthorDeppo, V Da, AuthorDebei, S, AuthorCecco, M De, AuthorDeller, Jakob1, Author              Feller, C, AuthorFornasier, S, AuthorFrattin, E, AuthorFulle, M, AuthorGroussin, O, AuthorGutierrez, P J, AuthorGüttler, Carsten1, Author              Hofmann, M, AuthorHviid, S F, AuthorIp, W H, AuthorKnollenberg, J, AuthorKramm, J R, AuthorKührt, E, AuthorKüppers, M, AuthorLa Forgia, F, AuthorLara, L M, AuthorLazzarin, M, AuthorLee, J-C, AuthorMoreno, J J Lopez, AuthorOklay, N, AuthorShi, Xian1, Author              Thomas, N, AuthorTubiana, Cecilia1, Author              Vincent, Jean-Baptiste1, Author               more..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 MPIS_GROUPS: Planets and Comets
 MPIS_PROJECTS: ROSETTA: OSIRIS
 Abstract: We provide a three-dimensional model of the inner layered structure of comet 67P based on the hypothesis of an extended layering independently wrapping each lobe. A large set of terrace orientations was collected on the latest shape model and then used as a proxy for the local orientation of the surfaces of discontinuity which defines the layers. We modelled the terraces as a family of concentric ellipsoidal shells with fixed axis ratios, producing a model that is completely defined by just eight free parameters. Each lobe of 67P has been modelled independently, and the two sets of parameters have been estimated by means of non-linear optimization of the measured terrace orientations. The proposed model is able to predict the orientation of terraces, the elongation of cliffs, the linear traces observed in the Wosret and Hathor regions and the peculiar alignment of boulder-like features which has been observed in the Hapi region, which appears to be related to the inner layering of the big lobe. Our analysis allowed us to identify a plane of junction between the two lobes, further confirming the independent nature of the lobes. Our layering models differ from the best-fitting topographic ellipsoids of the surface, demonstrating that the terraces are aligned to an internal structure of discontinuities, which is unevenly exposed on the surface, suggesting a complex history of localized material removal from the nucleus.

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Language(s): eng - English
 Dates: 2018-01-092017
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stx2899
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 469 (Suppl. 2) Sequence Number: - Start / End Page: S741 - S754 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150