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DOI | 10.1038/s41561-019-0307-9 |
Bilobate comet morphology and internal structure controlled by shear deformation | |
Matonti, C.1,2; Attree, N.1,3; Groussin, O.1; Jorda, L.1; Viseur, S.2; Hviid, S. F.4; Bouley, S.5; Nebouy, D.1; Auger, A-T1; Lamy, P. L.1,6; Sierks, H.7; Naletto, G.8,9,10; Rodrigo, R.11,12; Koschny, D.13; Davidsson, B.14; Barucci, M. A.15; Bertaux, J-L6; Bertini, I8; Bodewits, D.16; Cremonese, G.17; Da Deppo, V10; Debei, S.18; De Cecco, M.19; Deller, J.7; Fornasier, S.15; Fulle, M.20; Gutierrez, P. J.21; Guettler, C.7; Ip, W-H22,23; Keller, H. U.4,24; Lara, L. M.21; La Forgia, F.8; Lazzarin, M.8; Lucchetti, A.17; Lopez-Moreno, J. J.21; Marzari, F.8; Massironi, M.9,25; Mottola, S.4; Oklay, N.4; Pajola, M.17; Penasa, L.9; Preusker, F.4; Rickman, H.26,27; Scholten, F.4; Shi, X.7; Toth, I28; Tubiana, C.7; Vincent, J-B4 | |
2019-03-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:3页码:157-+ |
文章类型 | Article |
语种 | 英语 |
国家 | France; Scotland; Germany; Italy; Spain; Switzerland; Netherlands; USA; Taiwan; Peoples R China; Sweden; Poland; Hungary |
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. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460103000007 |
WOS关键词 | FAULT ZONES ; NUCLEUS ; FRACTURES ; EVOLUTION ; ORIGIN ; SYSTEM ; GROWTH |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34853 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Aix Marseille Univ, CNRS, CNES, LAM, Marseilles, France; 2.Aix Marseille Univ, Coll France, CEREGE, CNRS,IRD,INRA,RRH, Aix En Provence, France; 3.Univ Stirling, Fac Nat Sci, Stirling, Scotland; 4.Deutsch Zentrum Luft & Raumfahrt DLR, Inst Planetenforsch, Berlin, Germany; 5.Univ Paris Sud, Univ Paris Saclay, CNRS, GEOPS Geosci Paris Sud, Orsay, France; 6.CNRS UVSQ IPSL, LATMOS, Guyancourt, France; 7.Max Planck Inst Solar Syst Res, Gottingen, Germany; 8.Univ Padua, Dept Phys & Astron Galileo Galilei, Padua, Italy; 9.Univ Padua, Ctr Studies & Activ Space CISAS G Colombo, Padua, Italy; 10.CNR IFN UOS Padova LUXOR, Padua, Italy; 11.CSIC INTA, Ctr Astrobiol, Madrid, Spain; 12.Int Space Sci Inst, Bern, Switzerland; 13.European Space Res & Technol Ctr ESA, Sci Support Off, Noordwijk, Netherlands; 14.Jet Prop Lab, M-S 183-401, Pasadena, CA USA; 15.Univ PSL, Univ Paris Diderot, Sorbonne Univ, Sorbonne Paris Cite,CNRS,LESIA,Observ Paris, Meudon, France; 16.Auburn Univ, Dept Phys, Auburn, AL 36849 USA; 17.INAF, Astron Observ Padova, Padua, Italy; 18.Univ Padua, Dept Ind Engn, Padua, Italy; 19.Univ Trento, Fac Engn, Trento, Italy; 20.INAF, Astron Observ Trieste, Trieste, Italy; 21.Inst Astrofis Andalucia CSIC, Granada, Spain; 22.Natl Cent Univ, Grad Inst Astron, Chungli, Taiwan; 23.Macau Univ Sci & Technol, Space Sci Inst, Taipa, Macao, Peoples R China; 24.Tech Univ Carolo Wilhelmina Braunschweig, Inst Geophys & Extraterrestr Phys, Braunschweig, Germany; 25.Univ Padua, Dept Geosci, Padua, Italy; 26.Uppsala Univ, Dept Phys & Astron, Uppsala, Sweden; 27.PAS Space Res Ctr, Warsaw, Poland; 28.Konkoly Observ Budapest, Budapest, Hungary |
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]. NATURE GEOSCIENCE,2019,12(3):157-+. |
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),157-+. |
MLA | Matonti, C.,et al."Bilobate comet morphology and internal structure controlled by shear deformation".NATURE GEOSCIENCE 12.3(2019):157-+. |
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