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The two independent and primitive envelopes of the bilobate nucleus of comet 67P/Churyumov-Gerasimenko

Massironi, Matteo and Simioni, Emanuele and Marzari, Francesco and Cremonese, Gabriele and Giacomini, Lorenza and Pajola, Maurizio and Jorda, Laurent and Naletto, G. and Lowry, Stephen and El-Maarry, Mohamed Ramy and Preusker, Frank and Scholten, Frank and Sierks, Holger and Barbieri, Cesare and Lamy, Philippe and Rodrigo, Rafael and Koschny, Detlef and Rickman, Hans and Keller, Horst Uwe and A'Hearn, Michael and Auger, Anne-Thérèse and Barucci, M. Antonella and Bertaux, Jean-Loup and Bertini, Ivano and Besse, Sebastien and Bodewits, Dennis and Capanna, Claire and Da Deppo, Vania and Davidsson, Björn and Debei, Stefano and De Cecco, Mariolino and Ferri, Francesca and Fornasier, Sonia and Fulle, Marco and Gaskell, Robert and Groussin, Olivier and Gutiérrez, Pedro J. and Güttler, Carsten and Hviid, S. and Ip, Wing-Huen and Knollenberg, J. and Kovacs, Gabor and Kramm, Rainer and Kührt, E. and Küppers, Michael and La Forgia, Fiorangela and Lara, Luisa M. and Lazzarin, Monica and Lin, Zhong-Yi and Lopez Moreno, Josè J. and Magrin, Sara and Marchi, Simone and Michalik, Harald and Mottola, S. and Oklay, Nilda and Pommerol, Antoine and Thomas, Nicolas and Tubiana, Cecilia and Vincent, Jean-Baptiste (2015) The two independent and primitive envelopes of the bilobate nucleus of comet 67P/Churyumov-Gerasimenko. Nature, 526, pp. 402-405. Nature Publishing Group. DOI: 10.1038/nature15511 ISSN 0028-0836

Full text not available from this repository.

Abstract

The peculiar bi-lobed shape of comet 67P/Churyumov-Gerasimenko has raised the core question as to whether this is either the expression of two once-distinct objects or the result of a localized excavation on the outgassing region at the interface between the two lobes. The widespread layering involving most of the comet’s surface gives an unambiguous answer to this conundrum. Here we show that the major lobe (the main body) of the comet is enveloped by a nearly continuous set of layers, up to 650 m thick, which is independent from an analogous layered envelope on the minor lobe (the head). Gravity vectors computed for the two lobes separately are nearly perpendicular to the layers while gravity vectors of the entire nucleus diverge from perpendicular toward the neck, separating the two lobes. Therefore 67P/Churyumov-Gerasimenko is an accreted body of two distinct objects with “onion-like” layered envelopes, formed before they merged. Our analysis provides compelling evidence that gentle low-velocity collisions occurred between fully formed km-sized cometessimals in the early stages of the Solar System. In addition, the striking structural similarities between the two lobes, together with the established compositional homogeneity of the surface, indicate that early forming cometessimals experienced a similar primordial layering accretion, having formed completely independently.

Item URL in elib:https://elib.dlr.de/97417/
Document Type:Article
Title:The two independent and primitive envelopes of the bilobate nucleus of comet 67P/Churyumov-Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Massironi, MatteoDipartimento di Geoscienze, University of Padova, via G. Gradenigo 6, 35131 Padova, Italy, E-Mail: matteo.massironi (at) unipd.itUNSPECIFIED
Simioni, EmanueleCNR-IFN UOS Padova LUXOR, Via Trasea, 7, 35131 Padova , ItalyUNSPECIFIED
Marzari, FrancescoUniversity of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Cremonese, GabrieleINAF, Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, ItalyUNSPECIFIED
Giacomini, LorenzaDipartimento di Geoscienze, University of Padova, via G. Gradenigo 6, 35131 Padova, ItalyUNSPECIFIED
Pajola, MaurizioCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Jorda, LaurentAix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, FranceUNSPECIFIED
Naletto, G.Department of Information Engineering- University of Padova, Via Gradenigo 6/B, 35131 Padova, ItalyUNSPECIFIED
Lowry, StephenThe University of Kent, School of Physical Sciences, Canterbury, Kent, CT2 7NZ, UKUNSPECIFIED
El-Maarry, Mohamed RamyPhysikalisches Institut der Universität Bern, Sidlerstr. 5, 3012 Bern, SwitzerlandUNSPECIFIED
Preusker, Frankfrank.preusker (at) dlr.deUNSPECIFIED
Scholten, Frankfrank.scholten (at) dlr.deUNSPECIFIED
Sierks, HolgerMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIED
Barbieri, CesareUniversity of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Lamy, PhilippeAix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, FranceUNSPECIFIED
Rodrigo, RafaelCentro de Astrobiologia, CSIC-INTA, 28850 Torrejon de Ardoz, Madrid, SpainUNSPECIFIED
Koschny, DetlefScientific Support Office, European Space Research and Technology Centre/ESA, Keplerlaan 1, Postbus 299, 2201 AZ Noordwijk ZH, The NetherlandsUNSPECIFIED
Rickman, HansDepartment of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, SwedenUNSPECIFIED
Keller, Horst UweInstitut für Geophysik und extraterrestrische Physik (IGEP), Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, GermanyUNSPECIFIED
A'Hearn, MichaelUniversity of Maryland, Department of Astronomy, College Park, MD 20742-2421, USAUNSPECIFIED
Auger, Anne-ThérèseAix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, FranceUNSPECIFIED
Barucci, M. AntonellaLESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Universite Paris Diderot, 5 place J. Janssen, 92195, Meudon, FranceUNSPECIFIED
Bertaux, Jean-LoupLATMOS, CNRS/UVSQ/IPSL, 11 boulevard d'Alembert, 78280, Guyancourt, FranceUNSPECIFIED
Bertini, IvanoCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Besse, SebastienScientific Support Office, European Space Research and Technology Centre/ESA, Keplerlaan 1, Postbus 299, 2201 AZ Noordwijk ZH, The NetherlandsUNSPECIFIED
Bodewits, DennisUniversity of Maryland, Department of Astronomy, College Park, MD 20742-2421, USAUNSPECIFIED
Capanna, ClaireAix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, FranceUNSPECIFIED
Da Deppo, VaniaCNR-IFN UOS Padova LUXOR, Via Trasea, 7, 35131 Padova , ItalyUNSPECIFIED
Davidsson, BjörnDepartment of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, SwedenUNSPECIFIED
Debei, StefanoDepartment of Industrial Engineering – University of Padova, via Venezia 1, 35131 Padova, ItalyUNSPECIFIED
De Cecco, MariolinoUniversity of Trento, Via Mesiano 77, 38100 Trento, ItalyUNSPECIFIED
Ferri, FrancescaCentro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, ItalyUNSPECIFIED
Fornasier, SoniaLESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Universite Paris Diderot, 5 place J. Janssen, 92195, Meudon, FranceUNSPECIFIED
Fulle, MarcoINAF - Osservatorio Astronomico, Via Tiepolo 11, 34014 Trieste, ItalyUNSPECIFIED
Gaskell, RobertPlanetary Science Institute, Tucson, Arizona, USAUNSPECIFIED
Groussin, OlivierAix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, FranceUNSPECIFIED
Gutiérrez, Pedro J.Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomìa s/n, 18008 Granada, SpainUNSPECIFIED
Güttler, CarstenMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIED
Hviid, S.stubbe.hviid (at) dlr.deUNSPECIFIED
Ip, Wing-HuenNational Central University, Graduate Institute of Astronomy, 300 Chung-Da Rd, Chung-Li 32054 TaiwanUNSPECIFIED
Knollenberg, J.joerg.knollenberg (at) dlr.deUNSPECIFIED
Kovacs, GaborMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIED
Kramm, RainerMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIED
Kührt, E.ekkehard.kuehrt (at) dlr.deUNSPECIFIED
Küppers, MichaelOperations Department, European Space Astronomy Centre/ESA, P.O.Box 78, 28691 Villanueva de la Canada, Madrid, SpainUNSPECIFIED
La Forgia, FiorangelaUniversity of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Lara, Luisa M.Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomìa s/n, 18008 Granada, SpainUNSPECIFIED
Lazzarin, MonicaUniversity of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Lin, Zhong-YiNational Central University, Graduate Institute of Astronomy, 300 Chung-Da Rd, Chung-Li 32054 TaiwanUNSPECIFIED
Lopez Moreno, Josè J.Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomìa s/n, 18008 Granada, SpainUNSPECIFIED
Magrin, SaraUniversity of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, ItalyUNSPECIFIED
Marchi, SimoneSolar System Exploration Research, Virtual Institute, Southwest Research Institute, 1050 Walnut St., Suite 300, Boulder, Colorado 80302, USAUNSPECIFIED
Michalik, HaraldInstitut für Datentechnik und Kommunikationsnetze der TU Braunschweig, Hans-Sommer-Str. 66, 38106 Braunschweig, GermanyUNSPECIFIED
Mottola, S.stefano.mottola (at) dlr.deUNSPECIFIED
Oklay, NildaMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIED
Pommerol, AntoinePhysikalisches Institut der Universität Bern, Sidlerstr. 5, 3012 Bern, SwitzerlandUNSPECIFIED
Thomas, NicolasPhysikalisches Institut der Universität Bern, Sidlerstr. 5, 3012 Bern, SwitzerlandUNSPECIFIED
Tubiana, CeciliaMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIED
Vincent, Jean-BaptisteMax-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, GermanyUNSPECIFIED
Date:2015
Journal or Publication Title:Nature
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:526
DOI :10.1038/nature15511
Page Range:pp. 402-405
Publisher:Nature Publishing Group
ISSN:0028-0836
Status:Published
Keywords:bilobate nucleus, 67P, comet
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geodesy
Deposited By: Bründl, Tara-Marie
Deposited On:08 Dec 2015 10:45
Last Modified:08 Dec 2015 10:45

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