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  The big lobe of 67P/Churyumov–Gerasimenko comet: morphological and spectrophotometric evidences of layering as from OSIRIS data

Ferrari, S., Penasa, L., La Forgia, F., Massironi, M., Naletto, G., Lazzarin, M., et al. (2018). The big lobe of 67P/Churyumov–Gerasimenko comet: morphological and spectrophotometric evidences of layering as from OSIRIS data. Monthly Notices of the Royal Astronomical Society, 479(2), 1555-1568. doi:10.1093/mnras/sty1656.

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 Creators:
Ferrari, Sabrina, Author
Penasa, L, Author
La Forgia, F, Author
Massironi, M, Author
Naletto, G, Author
Lazzarin, M, Author
Fornasier, S, Author
Hasselmann, P H, Author
Lucchetti, A, Author
Pajola, M, Author
Ferri, F, Author
Cambianica, P, Author
Oklay, N, Author
Tubiana, Cecilia1, Author              
Sierks, Holger1, Author              
Lamy, P L, Author
Rodrigo, R, Author
Koschny, D, Author
Davidsson, B, Author
Barucci, M A, Author
Bertaux, J-L, AuthorBertini, I, AuthorBodewits, D, AuthorCremonese, G, AuthorDeppo, V Da, AuthorDebei, S, AuthorCecco, M De, AuthorDeller, Jakob1, Author              Franceschi, M, AuthorFrattin, E, AuthorFulle, M, AuthorGroussin, O, AuthorGutiérrez, P J, AuthorGüttler, Carsten1, Author              Hviid, S F, AuthorIp, W-H, AuthorJorda, L, AuthorKeller, H U, AuthorKnollenberg, J, AuthorKührt, E, AuthorKüppers, M, AuthorLara, L M, AuthorLópez-Moreno, J J, AuthorMarzari, F, AuthorShi, Xian1, Author              Simioni, E, AuthorThomas, N, AuthorVincent, J-B, Author more..
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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Free keywords: methods: data analysis, techniques: image processing, comets: general, comets: individual: 67P/Churyumov-Gerasimenko
 MPIS_PROJECTS: ROSETTA: OSIRIS
 Abstract: Between 2014 and 2016, ESA’s Rosetta OSIRIS cameras acquired multiple-filters images of the layered nucleus of comet 67P/Churyumov–Gerasimenko, ranging from ultraviolet to near-infrared wavelengths. No correlation between layers disposition and surface spectral variegation has been observed so far. This paper investigates possible spectral differences among decametre-thickness outcropping layers of the biggest lobe of the comet by means of OSIRIS image dataset. A two-classes maximum likelihood classification was applied on consolidated outcrops and relative deposits identified on post-perihelion multispectral images of the big lobe. We distinguished multispectral data on the basis of the structural elevation of the onion-shell Ellipsoidal Model of 67P. The spatial distribution of the two classes displays a clear dependence on the structural elevation, with the innermost class resulting over 50 per cent brighter than the outermost one. Consolidated cometary materials located at different structural levels are characterized by different brightness and revealed due to the selective removal of large volumes. This variegation can be attributed to a different texture of the outcrop surface and/or to a different content of refractory materials.

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Language(s): eng - English
 Dates: 2018-10-122018
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/sty1656
 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: 479 (2) Sequence Number: - Start / End Page: 1555 - 1568 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150