Molecular nitrogen in comet 67P/Churyumov-Gerasimenko indicates a low formation temperature

Author:

Rubin M.1,Altwegg K.12,Balsiger H.1,Bar-Nun A.3,Berthelier J.-J.4,Bieler A.15,Bochsler P.1,Briois C.6,Calmonte U.1,Combi M.5,De Keyser J.7,Dhooghe F.7,Eberhardt P.1,Fiethe B.8,Fuselier S. A.9,Gasc S.1,Gombosi T. I.5,Hansen K. C.5,Hässig M.19,Jäckel A.1,Kopp E.1,Korth A.10,Le Roy L.2,Mall U.10,Marty B.11,Mousis O.12,Owen T.13,Rème H.1415,Sémon T.1,Tzou C.-Y.1,Waite J. H.9,Wurz P.1

Affiliation:

1. Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.

2. Center for Space and Habitability, University of Bern, Sidlerstrasse. 5, CH-3012 Bern, Switzerland.

3. Department of Geoscience, Tel-Aviv University, Ramat-Aviv, Tel-Aviv, Israel.

4. Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS)/Institute Pierre Simon Laplace–CNRS-UPMC-UVSQ, 4 Avenue de Neptune F-94100, Saint-Maur, France.

5. Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, 2455 Hayward, Ann Arbor, MI 48109, USA.

6. Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), UMR 6115 CNRS–Université d'Orléans, Orléans, France.

7. Belgian Institute for Space Aeronomy, Belgisch Instituut voor Ruimte-Aeronomie–Institut d’Aéronomie Spatiale de Belgique (BIRA-IASB), Ringlaan 3, B-1180 Brussels, Belgium.

8. Institute of Computer and Network Engineering, Technische Universität Braunschweig, Hans-Sommer-Straße 66, D-38106 Braunschweig, Germany.

9. Department of Space Science, Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78228, USA.

10. Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany.

11. Centre de Recherches Pétrographiques et Géochimiques (CRPG)–CNRS, Université de Lorraine, 15 rue Notre Dame des Pauvres, Bôite Postale 20, 54501 Vandoeuvre lès Nancy, France.

12. Aix Marseille Université, CNRS, Laboratoire d'Astrophysique de Marseille UMR 7326, 13388, Marseille, France.

13. Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA.

14. Université de Toulouse; UPS-OMP; Institut de Recherche en Astrophysique et Planétologie (IRAP), Toulouse, France.

15. CNRS; IRAP; 9 Avenue du Colonel Roche, Boîte Postale 44346, F-31028 Toulouse Cedex 4, France.

Abstract

Making comets in the cold The speciation of nitrogen compounds in comets can tell us about their history. Comets are some of the most ancient bodies in the solar system and should contain the nitrogen compounds that were abundant when they formed. Using the ROSINA mass spectrometer aboard the Rosetta spacecraft orbiting comet 67P/Churyumov-Gerasimenko, Rubin et al. found molecular nitrogen at levels that are depleted compared to those in the primordial solar system. Depletion of such a magnitude suggests that the comet formed either from the low-temperature agglomeration of pristine amorphous water ice grains or from clathrates. Science , this issue p. 232

Funder

Jet Propulsion Laboratory

European Research Council

European Space Agency

French National Research Agency

Swiss National Science Foundation

Max-Planck Society

Bundesministerium für Wirtschaft und Energie

State of Bern

Southwest Research Institute

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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