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DOI	10.1038/s41561-019-0307-9
	Bilobate comet morphology and internal structure controlled by shear deformation
	Matonti C.; Attree N.; Groussin O.; Jorda L.; Viseur S.; Hviid S.F.; Bouley S.; Nébouy D.; Auger A.-T.; Lamy P.L.; Sierks H.; Naletto G.; Rodrigo R.; Koschny D.; Davidsson B.; Barucci M.A.; Bertaux J.-L.; Bertini I.; Bodewits D.; Cremonese G.; Da Deppo V.; Debei S.; De Cecco M.; Deller J.; Fornasier S.; Fulle M.; Gutiérrez P.J.; Güttler C.; Ip W.-H.; Keller H.U.; Lara L.M.; La Forgia F.; Lazzarin M.; Lucchetti A.; López-Moreno J.J.; Marzari F.; Massironi M.; Mottola S.; Oklay N.; Pajola M.; Penasa L.; Preusker F.; Rickman H.; Scholten F.; Shi X.; Toth I.; Tubiana C.; Vincent J.-B.
发表日期	2019
ISSN	17520894
卷号	12 期号:3
英文摘要	Bilobate comets—small icy bodies with two distinct lobes—are a common configuration among comets, but the factors shaping these bodies are largely unknown. Cometary nuclei, the solid centres of comets, erode by ice sublimation when they are sufficiently close to the Sun, but the importance of a comet’s internal structure on its erosion is unclear. Here we present three-dimensional analyses of images from the Rosetta mission to illuminate the process that shaped the Jupiter-family bilobate comet 67P/Churyumov–Gerasimenko over billions of years. We show that the comet’s surface and interior exhibit shear-fracture and fault networks, on spatial scales of tens to hundreds of metres. Fractures propagate up to 500 m below the surface through a mechanically homogeneous material. Through fracture network analysis and stress modelling, we show that shear deformation generates fracture networks that control mechanical surface erosion, particularly in the strongly marked neck trough of 67P/Churyumov–Gerasimenko, exposing its interior. We conclude that shear deformation shapes and structures the surface and interior of bilobate comets, particularly in the outer Solar System where water ice sublimation is negligible. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	deformation mechanism; fault; fracture network; mechanical property; network analysis; sublimation
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124704
作者单位	Aix Marseille Université, CNRS, CNES, LAM, Marseilles, France; Aix Marseille Université, CNRS, IRD, INRA, Coll France, CEREGE, RRH, Aix-en-Provence, France; Faculty of Natural Sciences, University of Stirling, Stirling, United Kingdom; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Planetenforschung, Berlin, Germany; GEOPS—Géosciences Paris Sud, Université Paris-Sud, CNRS, Université Paris-Saclay, Orsay, France; LATMOS, CNRS/UVSQ/IPSL, Guyancourt, France; Max Planck Institute for Solar System Research, Göttingen, Germany; University of Padova, Department of Physics and Astronomy “Galileo Galilei”, Padua, Italy; University of Padova, Center of Studies and Activities for Space (CISAS) “G. Colombo”, Padua, Italy; CNR-IFN UOS Padova LUXOR, Padua, Italy; Centro de Astrobiologia, CSIC-INTA, Torrejon de Ardoz, Madrid, Spain; International Space Science Institute, Bern, Switzerland; Science Support Office, European Space Research and Technology Centre/ESA, Noordwijk, Netherlands; Jet Propulsion Lab...
推荐引用方式 GB/T 7714	Matonti C.,Attree N.,Groussin O.,et al. Bilobate comet morphology and internal structure controlled by shear deformation[J],2019,12(3).
APA	Matonti C..,Attree N..,Groussin O..,Jorda L..,Viseur S..,...&Vincent J.-B..(2019).Bilobate comet morphology and internal structure controlled by shear deformation.Nature Geoscience,12(3).
MLA	Matonti C.,et al."Bilobate comet morphology and internal structure controlled by shear deformation".Nature Geoscience 12.3(2019).