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    Geomorphology of the Imhotep region on comet 67P/Churyumov-Gerasimenko from OSIRIS observations

    Auger, A.-T. and Groussin, O. and Jorda, L. and Bouley, S. and Gaskell, R. and Lamy, P.L. and Capanna, C. and Thomas, N. and Pommerol, A. and Sierks, H. and Barbieri, C. and Rodrigo, R. and Koschny, D. and Rickman, H. and Keller, H.U. and Agarwal, J. and A’Hearn, M.F. and Barucci, M.A. and Bertaux, J.-L. and Bertini, I. and Cremonese, G. and Da Deppo, V. and Davidsson, B. and Debei, S. and De Cecco, M. and El-Maarry, Mohamed Ramy and Fornasier, S. and Fulle, M. and Gutiérrez, P.J. and Güttler, C. and Hviid, S. and Ip, W.-H. and Knollenberg, J. and Kramm, J.-R. and Kührt, E. and Küppers, M. and La Forgia, F. and Lara, L.M. and Lazzarin, M. and Lopez Moreno, J.J. and Marchi, S. and Marzari, F. and Massironi, M. and Michalik, H. and Naletto, G. and Oklay, N. and Pajola, M. and Sabau, L. and Tubiana, C. and Vincent, J.-B. and Wenzel, K.-P. (2015) Geomorphology of the Imhotep region on comet 67P/Churyumov-Gerasimenko from OSIRIS observations. Astronomy & Astrophysics 583 , A35. ISSN 0004-6361.

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    Abstract

    Context. Since August 2014, the OSIRIS Narrow Angle Camera (NAC) onboard the Rosetta spacecraft has acquired high spatial resolution images of the nucleus of comet 67P/Churyumov-Gerasimenko, down to the decimeter scale. This paper focuses on the Imhotep region, located on the largest lobe of the nucleus, near the equator. Aims. We map, inventory, and describe the geomorphology of the Imhotep region. We propose and discuss some processes to explain the formation and ongoing evolution of this region. Methods. We used OSIRIS NAC images, gravitational heights and slopes, and digital terrain models to map and measure the morphologies of Imhotep. Results. The Imhotep region presents a wide variety of terrains and morphologies: smooth and rocky terrains, bright areas, linear features, roundish features, and boulders. Gravity processes such as mass wasting and collapse play a significant role in the geomorphological evolution of this region. Cometary processes initiate erosion and are responsible for the formation of degassing conduits that are revealed by elevated roundish features on the surface. We also propose a scenario for the formation and evolution of the Imhotep region; this implies the presence of large primordial voids inside the nucleus, resulting from its formation process.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): comets: individual: 67P/Churyumov-Gerasimenko / methods: data analysis
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Depositing User: Administrator
    Date Deposited: 20 Nov 2018 14:23
    Last Modified: 20 Nov 2018 14:23
    URI: http://eprints.bbk.ac.uk/id/eprint/25201

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