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

Autor: Cesare Barbieri, Jean-Loup Bertaux, Stefano Debei, Monica Lazzarin, Holger Sierks, Antoine Pommerol, Olivier Groussin, Matteo Massironi, Stubbe F. Hviid, Jean-Baptiste Vincent, L. Sabau, K.-P. Wenzel, Harald Michalik, Marco Fulle, N. Thomas, Detlef Koschny, Sylvain Bouley, Mariolino De Cecco, A.-T. Auger, Laurent Jorda, Mohamed Ramy El-Maarry, Philippe Lamy, Simone Marchi, Hans Rickman, Vania Da Deppo, Carsten Güttler, Nilda Oklay, Florangela La Forgia, Jessica Agarwal, Gabriel Cremonese, Ivano Bertini, Michael Küppers, M. A. Barucci, W-H. Ip, Björn Davidsson, Giampiero Naletto, Francesco Marzari, Cecilia Tubiana, J.-R. Kramm, Jose J. Lopez Moreno, Claire Capanna, Maurizio Pajola, Michael F. A'Hearn, Luisa Lara, Jörg Knollenberg, Sonia Fornasier, Ekkerhard Kührt, H. U. Keller, Pedro J. Gutiérrez, R. Rodrigo, Robert Gaskell
Přispěvatelé: Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Planetary Science Institute [Tucson] (PSI), Physikalisches Institut [Bern], Universität Bern [Bern], Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Dipartimento di Fisica e Astronomia 'Galileo Galilei', Universita degli Studi di Padova, International Space Science Institute [Bern] (ISSI), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA)-European Space Agency (ESA), Space Research Centre of Polish Academy of Sciences (CBK), Polska Akademia Nauk = Polish Academy of Sciences (PAN), Department of Physics and Astronomy [Uppsala], Uppsala University, Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Department of Astronomy [College Park], University of Maryland [College Park], University of Maryland System-University of Maryland System, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Department of Industrial Engineering [Padova], CNR Institute for Photonics and Nanotechnologies (IFN), Consiglio Nazionale delle Ricerche [Roma] (CNR), University of Trento [Trento], Université Paris Diderot - Paris 7 (UPD7), INAF - Osservatorio Astronomico di Trieste (OAT), Istituto Nazionale di Astrofisica (INAF), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), DLR Institute of Planetary Research, German Aerospace Center (DLR), Institute of Space Science [Taiwan], National Central University [Taiwan] (NCU), Operations Department (ESAC), European Space Astronomy Centre (ESAC), Solar System Exploration Research Virtual Institute (SSERVI), Southwest Research Institute [Boulder] (SwRI), INAF - Osservatorio Astronomico di Padova (OAPD), Institut für Datentechnik und Kommunikationsnetze, Department of Information Engineering [Padova] (DEI), Instituto Nacional de Técnica Aeroespacial (INTA), DLR (Germany), CNES (France), ASI (Italy), MEC (Spain), SNSB (Sweden), ESA Technical Directorate, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Universität Bern [Bern] (UNIBE), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Università degli Studi di Padova = University of Padua (Unipd), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), ITA, USA, GBR, FRA, DEU, ESP
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2015, 583, A35 (13 p.). ⟨10.1051/0004-6361/201525947⟩
Astronomy & Astrophysics
Astronomy and Astrophysics-A&A, 2015, 583, A35 (13 p.). ⟨10.1051/0004-6361/201525947⟩
Astronomy & astrophysics
583 (2015). doi:10.1051/0004-6361/201525947
info:cnr-pdr/source/autori:Auger, A. T.; Groussin, O.; Jorda, L.; Bouley, S.; Gaskell, R.; Lamy, P. L.; Capanna, C.; Thomas, N.; Pommerol, A.; Sierks, H.; Barbieri, C.; Rodrigo, R.; Koschny, D.; Rickman, H.; Keller, H. U.; Agarwal, J.; A'Hearn, M. F.; Barucci, M. A.; Bertaux, J. L.; Bertini, I.; Cremonese, G.; Da Deppo, V.; Davidsson, B.; Debei, S.; De Cecco, M.; El-Maarry, M. R.; Fornasier, S.; Fulle, M.; Gutiérrez, P. J.; Güttler, C.; Hviid, S.; Ip, W. H.; Knollenberg, J.; Kramm, J. R.; Kührt, E.; Küppers, M.; La Forgia, F.; Lara, L. M.; Lazzarin, M.; Lopez Moreno, J. J.; Marchi, S.; Marzari, F.; Massironi, M.; Michalik, H.; Naletto, G.; Oklay, N.; Pajola, M.; Sabau, L.; Tubiana, C.; Vincent, J. B.; Wenzel, K. P./titolo:Geomorphology of the Imhotep region on comet 67P%2FChuryumov-Gerasimenko from OSIRIS observations/doi:10.1051%2F0004-6361%2F201525947/rivista:Astronomy & astrophysics (Print)/anno:2015/pagina_da:/pagina_a:/intervallo_pagine:/volume:583
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201525947⟩
Popis: International audience; 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 mor- phologies 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 geomor- phological 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.
Databáze: OpenAIRE
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