Two independent and primitive envelopes of the bilobate nucleus of comet 67P

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

Dieses Archiv kann nicht den Volltext zur Verfügung stellen.

Kurzfassung

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.

elib-URL des Eintrags:

https://elib.dlr.de/97417/

Dokumentart:

Zeitschriftenbeitrag

Titel:

Two independent and primitive envelopes of the bilobate nucleus of comet 67P

Autoren:

Autoren	Institution oder E-Mail-Adresse	Autoren-ORCID-iD
Massironi, Matteo	Dipartimento di Geoscienze, University of Padova, via G. Gradenigo 6, 35131 Padova, Italy, E-Mail: matteo.massironi (at) unipd.it
Simioni, Emanuele	CNR-IFN UOS Padova LUXOR, Via Trasea, 7, 35131 Padova , Italy
Marzari, Francesco	University of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, Italy
Cremonese, Gabriele	INAF, Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
Giacomini, Lorenza	Dipartimento di Geoscienze, University of Padova, via G. Gradenigo 6, 35131 Padova, Italy
Pajola, Maurizio	Centro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, Italy
Jorda, Laurent	Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France
Naletto, G.	Department of Information Engineering- University of Padova, Via Gradenigo 6/B, 35131 Padova, Italy
Lowry, Stephen	The University of Kent, School of Physical Sciences, Canterbury, Kent, CT2 7NZ, UK
El-Maarry, Mohamed Ramy	Physikalisches Institut der Universität Bern, Sidlerstr. 5, 3012 Bern, Switzerland
Preusker, Frank	frank.preusker (at) dlr.de	https://orcid.org/0000-0001-9005-4202
Scholten, Frank	frank.scholten (at) dlr.de
Sierks, Holger	Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany
Barbieri, Cesare	University of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, Italy
Lamy, Philippe	Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France
Rodrigo, Rafael	Centro de Astrobiologia, CSIC-INTA, 28850 Torrejon de Ardoz, Madrid, Spain
Koschny, Detlef	Scientific Support Office, European Space Research and Technology Centre/ESA, Keplerlaan 1, Postbus 299, 2201 AZ Noordwijk ZH, The Netherlands
Rickman, Hans	Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
Keller, Horst Uwe	Institut für Geophysik und extraterrestrische Physik (IGEP), Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany
A'Hearn, Michael	University of Maryland, Department of Astronomy, College Park, MD 20742-2421, USA
Auger, Anne-Thérèse	Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France
Barucci, M. Antonella	LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Universite Paris Diderot, 5 place J. Janssen, 92195, Meudon, France
Bertaux, Jean-Loup	LATMOS, CNRS/UVSQ/IPSL, 11 boulevard d'Alembert, 78280, Guyancourt, France
Bertini, Ivano	Centro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, Italy
Besse, Sebastien	Scientific Support Office, European Space Research and Technology Centre/ESA, Keplerlaan 1, Postbus 299, 2201 AZ Noordwijk ZH, The Netherlands
Bodewits, Dennis	University of Maryland, Department of Astronomy, College Park, MD 20742-2421, USA
Capanna, Claire	Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France
Da Deppo, Vania	CNR-IFN UOS Padova LUXOR, Via Trasea, 7, 35131 Padova , Italy
Davidsson, Björn	Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
Debei, Stefano	Department of Industrial Engineering – University of Padova, via Venezia 1, 35131 Padova, Italy
De Cecco, Mariolino	University of Trento, Via Mesiano 77, 38100 Trento, Italy
Ferri, Francesca	Centro di Ateneo di Studi ed Attività Spaziali “Giuseppe Colombo” (CISAS), University of Padova, Via Venezia 15, 35131 Padova, Italy
Fornasier, Sonia	LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Universite Paris Diderot, 5 place J. Janssen, 92195, Meudon, France
Fulle, Marco	INAF - Osservatorio Astronomico, Via Tiepolo 11, 34014 Trieste, Italy
Gaskell, Robert	Planetary Science Institute, Tucson, Arizona, USA
Groussin, Olivier	Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, 38 rue Frédéric Joliot-Curie, 13388 Marseille, France
Gutiérrez, Pedro J.	Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomìa s/n, 18008 Granada, Spain
Güttler, Carsten	Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany
Hviid, S.	stubbe.hviid (at) dlr.de
Ip, Wing-Huen	National Central University, Graduate Institute of Astronomy, 300 Chung-Da Rd, Chung-Li 32054 Taiwan
Knollenberg, J.	joerg.knollenberg (at) dlr.de
Kovacs, Gabor	Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany
Kramm, Rainer	Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany
Kührt, E.	ekkehard.kuehrt (at) dlr.de
Küppers, Michael	Operations Department, European Space Astronomy Centre/ESA, P.O.Box 78, 28691 Villanueva de la Canada, Madrid, Spain
La Forgia, Fiorangela	University of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, Italy
Lara, Luisa M.	Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomìa s/n, 18008 Granada, Spain
Lazzarin, Monica	University of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, Italy
Lin, Zhong-Yi	National Central University, Graduate Institute of Astronomy, 300 Chung-Da Rd, Chung-Li 32054 Taiwan
Lopez Moreno, Josè J.	Instituto de Astrofisica de Andalucia (CSIC), c/ Glorieta de la Astronomìa s/n, 18008 Granada, Spain
Magrin, Sara	University of Padova, Department of Physics and Astronomy, Vicolo dell'Osservatorio 3, 35122 Padova, Italy
Marchi, Simone	Solar System Exploration Research, Virtual Institute, Southwest Research Institute, 1050 Walnut St., Suite 300, Boulder, Colorado 80302, USA
Michalik, Harald	Institut für Datentechnik und Kommunikationsnetze der TU Braunschweig, Hans-Sommer-Str. 66, 38106 Braunschweig, Germany
Mottola, S.	stefano.mottola (at) dlr.de	https://orcid.org/0000-0002-0457-3872
Oklay, Nilda	Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany
Pommerol, Antoine	Physikalisches Institut der Universität Bern, Sidlerstr. 5, 3012 Bern, Switzerland
Thomas, Nicolas	Physikalisches Institut der Universität Bern, Sidlerstr. 5, 3012 Bern, Switzerland
Tubiana, Cecilia	Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany
Vincent, Jean-Baptiste	Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, 37077, Göttingen, Germany

Datum:

2015

Erschienen in:

Nature

Open Access:

Nein

In SCOPUS:

In ISI Web of Science:

Band:

526

DOI:

10.1038/nature15511

Seitenbereich:

Seiten 402-405

Verlag:

Nature Publishing Group

ISSN:

0028-0836

Stichwörter:

bilobate nucleus, 67P, comet

DLR - Schwerpunkt:

Raumfahrt

DLR - Forschungsgebiet:

R EW - Erforschung des Weltraums

Standort:

Berlin-Adlershof

Institute & Einrichtungen:

Institut für Planetenforschung > Asteroiden und Kometen
Institut für Planetenforschung > Planetengeodäsie

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Einige Felder oben sind zurzeit ausgeblendet: Alle Felder anzeigen