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    Geologic mapping of the Comet 67P/Churyumov–Gerasimenko's Northern hemisphere

    Giacomini, L. and Massironi, M. and El-Maarry, Mohamed Ramy and Penasa, L. and Pajola, M. and Thomas, N. and Lowry, S.C. and Barbieri, C. and Cremonese, G. and Ferri, F. and Naletto, G. and Bertini, I. and La Forgia, F. and Lazzarin, M. and Marzari, F. and Sierks, H. and Lamy, P.L. and Rodrigo, R. and Rickman, H. and Koschny, D. and Keller, H.U. and Agarwal, J. and A'Hearn, M.F. and Auger, A.-T. and Barucci, M.A. and Bertaux, J.-L. and Besse, S. and Bodewits, D. and Da Deppo, V. and Davidsson, B. and De Cecco, M. and Debei, S. and Fornasier, S. and Fulle, M. and Groussin, O. and Gutierrez, P.J. and Güttler, C. and Hviid, S.F. and Ip, W.-H. and Jorda, L. and Knollenberg, J. and Kovacs, G. and Kramm, J.-R. and Kührt, E. and Küppers, M. and Lara, L.M. and Moreno, J.J. Lopez and Magrin, S. and Michalik, H. and Oklay, N. and Pommerol, A. and Preusker, F. and Scholten, F. and Tubiana, C. and Vincent, J.-B. (2016) Geologic mapping of the Comet 67P/Churyumov–Gerasimenko's Northern hemisphere. Monthly Notices of the Royal Astronomical Society 462 (Suppl), S352-S367. ISSN 0035-8711.

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    Abstract

    The Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS), the scientific imaging system onboard the Rosetta mission, has been acquiring images of the nucleus of the comet 67P/Churyumov–Gerasimenko since 2014 August with a resolution which allows a detailed analysis of its surface. Indeed, data reveal a complex surface morphology which is likely the expression of different processes which occurred at different times on the cometary nucleus. In order to characterize these different morphologies and better understand their distribution, we performed a geologic mapping of comet's 67P Northern hemisphere in which features have been distinguished based on their morphological, textural and stratigraphic characteristics. For this purpose, we used narrow-angle camera images acquired in 2014 August and September with a spatial scale ranging from 1.2 to 2.4 m pixel–1. Several different geologic units have been identified on the basis of their different surface textures, granulometry and morphology. Some of these units are distinctive and localized, whereas others are more common and distributed all over the Northern hemisphere. Moreover, different types of linear features have been distinguished on the basis of their morphology. Some of these lineaments have never been observed before on a comet and can offer important clues on the internal structures of the nucleus itself. The geologic mapping results presented here will allow us to better understand the processes which affected the nucleus’ surface and thus the origin and evolutionary history of comet 67P/Churyumov–Gerasimenko.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): methods: observational, comets: general, comets: individual: 67P/Churyumov–Gerasimenko
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Depositing User: Administrator
    Date Deposited: 17 Oct 2018 17:53
    Last Modified: 12 Aug 2019 09:37
    URI: http://eprints.bbk.ac.uk/id/eprint/24743

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