elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Global-scale brittle plastic rheology at the cometesimals merging of comet 67P/Churyumov-Gerasimenko

Franceschi, Marco and Penasa, Luca and Massironi, Matteo and Naletto, Giampiero and Ferrari, Sabrina and Fondriest, Michele and Bodewits, Dennis and Güttler, Carsten and Lucchetti, Alice and Mottola, Stefano and Pajola, Maurizio and Toth, Imre and Deller, Jacob and Sierks, Holger and Tubiana, Cecilia (2020) Global-scale brittle plastic rheology at the cometesimals merging of comet 67P/Churyumov-Gerasimenko. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 117 (19), pp. 10181-10187. National Academy of Sciences. doi: 10.1073/pnas.1914552117. ISSN 0027-8424.

This is the latest version of this item.

[img] PDF - Only accessible within DLR - Published version
2MB

Official URL: https://www.pnas.org/content/117/19/10181

Abstract

Unraveling the mechanical behavior of comet-forming materials is key for understanding the genesis and nature of these primordial bodies. We show that the two cometesimals forming comet 67P/Churyumov-Gerasimenko underwent global brittle plastic deformation at the impact that created the bilobate nucleus. Impact-induced deformations were accommodated through large-scale folding of the layered structure and the formation of deep fractures. Axial compression and transversal elongation of the Small Lobe's structure highlighted by three-dimensional modeling indicate that deformation was globally transferred to transversal strain. These features point to a rheological model in which the bonding action of ice with potential contribute of organics is a main factor governing the bulk rheology of cometesimals.

Item URL in elib:https://elib.dlr.de/138627/
Document Type:Article
Title:Global-scale brittle plastic rheology at the cometesimals merging of comet 67P/Churyumov-Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Franceschi, MarcoDepartment of Mathematics and Geosciences, University of Trieste, Via E. Weiss 2, 34128 10 Trieste, ItalyUNSPECIFIEDUNSPECIFIED
Penasa, LucaCenter of Studies and Activities for Space, CISAS, `G. Colombo’, University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Massironi, MatteoGeosciences Department, University of Padova, via G. Gradenigo 6, 35131, Padova, ItalyUNSPECIFIEDUNSPECIFIED
Naletto, GiampieroCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, via Venezia 15, 35131 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Ferrari, SabrinaCISAS, Università degli studi di Padova, ItalyUNSPECIFIEDUNSPECIFIED
Fondriest, MicheleGeosciences Department, University of Padova, via G. Gradenigo 6, 35131, Padova, ItalyUNSPECIFIEDUNSPECIFIED
Bodewits, DennisPhysics Department, Auburn University, Leach Science Center, Auburn, AL 36849, USA.UNSPECIFIEDUNSPECIFIED
Güttler, CarstenMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIEDUNSPECIFIED
Lucchetti, AliceINAF, Astronomical Observatory of Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Mottola, StefanoUNSPECIFIEDhttps://orcid.org/0000-0002-0457-3872UNSPECIFIED
Pajola, MaurizioINAF, Astronomical Observatory of Padova, Vicolo dell’Osservatorio 5, 35122 Padova, ItalyUNSPECIFIEDUNSPECIFIED
Toth, ImreKonkoly Observatory of the Hungarian Academy of Sciences, PO Box 67, 1525 Budapest, HungaryUNSPECIFIEDUNSPECIFIED
Deller, JacobMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIEDUNSPECIFIED
Sierks, HolgerMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIEDUNSPECIFIED
Tubiana, CeciliaMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, GermanyUNSPECIFIEDUNSPECIFIED
Date:28 April 2020
Journal or Publication Title:Proceedings of the National Academy of Sciences of the United States of America (PNAS)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:117
DOI:10.1073/pnas.1914552117
Page Range:pp. 10181-10187
Publisher:National Academy of Sciences
ISSN:0027-8424
Status:Published
Keywords:comet, impact, deformation, rheology, 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
Institute of Planetary Research > Planetary Geodesy
Deposited By: Mottola, Dr.phys. Stefano
Deposited On:03 Dec 2020 14:57
Last Modified:20 Oct 2023 09:37

Available Versions of this Item

  • Global-scale brittle plastic rheology at the cometesimals merging of comet 67P/Churyumov-Gerasimenko. (deposited 03 Dec 2020 14:57) [Currently Displayed]

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.