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The Rocky-Like Behavior of Cometary Landslides on 67P/Churyumov-Gerasimenko

Lucchetti, Alice and Penasa, Luca and Pajola, Maurizio and Massironi, Matteo and Brunetti, Maria Teresa and Cremonese, Gabriele and Oklay, Nilda and Vincent, J. B. and Mottola, Stefano and Fornasier, Sonia and Sierks, Holger and Naletto, Giampiero and Lamy, P. and Rodrigo, Rafael and Koschny, Detlef and Davidsson, Björn and Barbieri, Cesare and Barucci, Maria Antonietta and Bertaux, J.-L. and Bertini, Ivano and Bodewits, Dennis and Cambianica, P and Da Deppo, Vania and Debei, Stefano and De Cecco, Mariolino and Deller, Jakob and Ferrari, Sabrina and Ferri, Francesca and Franceschi, M. and Fulle, Marco and Gutierrez, Pedro J. and Güttler, Carsten and Ip, W H and Keller, H U and Lara, Luisa and Lazzarin, Monica and Moreno, J. L. Lopez and Marzari, Francesco and Tubiana, Cecilia (2019) The Rocky-Like Behavior of Cometary Landslides on 67P/Churyumov-Gerasimenko. Geophysical Research Letters, 46 (24), pp. 14336-14346. Wiley. doi: 10.1029/2019GL085132. ISSN 0094-8276.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019GL085132

Abstract

Landslides have been identified on several solar system bodies, and different mechanisms have been proposed to explain their runout length. We analyze images from the Rosetta mission and report the global characterization of such features on comet 67P/Churyumov-Gerasimenko's surface. By assuming the height to runout length as an approximation for the friction coefficient of landslide material, we find that on comet 67P, this ratio falls between 0.50 and 0.97. Such unexpected high values reveal a rocky-type mechanical behavior that is much more akin to Earth dry landslides than to icy satellites' mass movements. This behavior indicates that 67P and likely comets in general are characterized by consolidated materials possibly rejecting the idea that they are fluffy aggregates. The variability of the runout length among 67P landslides can be attributed to the different volatile content located in the top few meters of the cometary crust, which can drive the mass movement.

Item URL in elib:https://elib.dlr.de/138634/
Document Type:Article
Title:The Rocky-Like Behavior of Cometary Landslides on 67P/Churyumov-Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Lucchetti, AliceCenter of Studies and Activities for Space, CISAS, G. Colombo, University of Padova, via Venezia 15, 35131, Padova, ItalyUNSPECIFIEDUNSPECIFIED
Penasa, LucaCenter of Studies and Activities for Space, CISAS, `G. Colombo’, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Pajola, MaurizioCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Massironi, MatteoINAF, Padova, ItalyUNSPECIFIEDUNSPECIFIED
Brunetti, Maria TeresaResearch Institute for Geo‐Hydrological Protection‐Italian National Research Council, Perugia, ItalyUNSPECIFIEDUNSPECIFIED
Cremonese, GabrieleNAF Osservatorio Astronomico di Padova, Vic. Osservatorio 5, 35122, Padova, ItalyUNSPECIFIEDUNSPECIFIED
Oklay, NildaUNSPECIFIEDhttps://orcid.org/0000-0002-4909-9692UNSPECIFIED
Vincent, J. B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mottola, StefanoUNSPECIFIEDhttps://orcid.org/0000-0002-0457-3872UNSPECIFIED
Fornasier, SoniaLESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Universite Paris Diderot, 5 place Jules Janssen, 92195 Meudon, FranceUNSPECIFIEDUNSPECIFIED
Sierks, HolgerMax Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen,UNSPECIFIEDUNSPECIFIED
Naletto, GiampieroCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Lamy, P.LAM (Laboratoire d’Astrophysique de Marseille), CNRS, AixUNSPECIFIEDUNSPECIFIED
Rodrigo, RafaelInstituto de Astrofisica de Andalucia, CSIC, Granada, SpainUNSPECIFIEDUNSPECIFIED
Koschny, DetlefScientific Support Office, European Space Research and Technology Centre/ESA, Keplerlaan 1, Postbus 299, 2201 AZ Noordwijk ZH, The NetherlandsUNSPECIFIEDUNSPECIFIED
Davidsson, BjörnUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barbieri, CesareUniversity of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Barucci, Maria AntoniettaLESIA-Observatoire de Paris, FranceUNSPECIFIEDUNSPECIFIED
Bertaux, J.-L.Laboratoire Atmosphères, Milieux, Observations Spatiales, CNRS/UVSQ/UPMC, 11 boulevard d’Alembert, 78280 Guyancourt, FranceUNSPECIFIEDUNSPECIFIED
Bertini, IvanoCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Bodewits, DennisUniversity of Maryland, Department of Astronomy, College Park, MD 20742-2421, USAUNSPECIFIEDUNSPECIFIED
Cambianica, PCenter of Studies and Activities for Space, CISAS, `G. Colombo’, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Da Deppo, VaniaCNR-IFN UOS Padova LUXOR, Via Trasea, 7, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Debei, StefanoDepartment of Industrial Engineering – University of Padova, via Venezia 1, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
De Cecco, MariolinoUNITN, Universitá di Trento, Via Mesiano, 77, 38100 Trento, ItalyUNSPECIFIEDUNSPECIFIED
Deller, JakobMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3,UNSPECIFIEDUNSPECIFIED
Ferrari, SabrinaDipartimento di Geoscienze, Università degli studi di Padova, ItalyUNSPECIFIEDUNSPECIFIED
Ferri, FrancescaCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Franceschi, M.Geosciences Department, University of Padova, via G. Gradenigo 6, I-35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Fulle, MarcoINAF, Osservatorio Astronomico, Via Tiepolo 11, 34014 Trieste, ItalyUNSPECIFIEDUNSPECIFIED
Gutierrez, Pedro J.Instituto de Astrofisica de Andalucia CSIC, Glorieta de la Astronomia, 18008, Granada, SpainUNSPECIFIEDUNSPECIFIED
Güttler, CarstenMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIEDUNSPECIFIED
Ip, W HInstitute for Space Science, National Central University, 32054 Chung-Li, TaiwanUNSPECIFIEDUNSPECIFIED
Keller, H UInstitute for Geophysics and Extraterrestrial Physics, TU Braunschweig, Braunschweig, D-38106 GermanyUNSPECIFIEDUNSPECIFIED
Lara, LuisaInstituto de Astrofisica de AndaluciaUNSPECIFIEDUNSPECIFIED
Lazzarin, MonicaDepartment of Astronomy, University of PaduaUNSPECIFIEDUNSPECIFIED
Moreno, J. L. Lopezinstituto de astrofisica de andalucia csic, glorieta de la astronomia, 18008, granada, spainUNSPECIFIEDUNSPECIFIED
Marzari, FrancescoUniversity of Padova, Deptartment of Physics and Astronomy, via Marzolo 8, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Tubiana, CeciliaMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIEDUNSPECIFIED
Date:2019
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:46
DOI:10.1029/2019GL085132
Page Range:pp. 14336-14346
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:comets, landslides, 67P/Churyumov-Gerasimenko
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project ROSETTA Instruments (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Mottola, Dr.phys. Stefano
Deposited On:03 Dec 2020 15:00
Last Modified:03 Dec 2020 15:00

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