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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2017

Evidence of sub-surface energy storage in comet 67P from the outburst of 2016 July 03

Jessica Agarwal (1) , Vincenzo Della Corte (2) , Paul D. Feldman (3) , Bernhard Geiger (4) , S. Merouane (1) , Ivano Bertini (5) , Dennis Bodewits (6) , Sonia Fornasier (7) , Eberhard Grün (8, 9) , Pedro Henrique Hasselmann (7) , Martin Hilchenbach (1) , Sebastien Höfner (1) , Stavro Ivanovski (10) , Ludmilla Kolokolova (6) , Maurizio Pajola (11) , Alessandra Rotundi (12) , Holger Sierks (1) , Andrew J. Steffl (13) , Nicolas Thomas (14) , Michael A'Hearn (6) , Cesare Barbieri (15) , Maria Antonella Barucci (7) , Jean-Loup Bertaux (16) , Steve Boudreault (1) , Gabriele Cremonese (17) , Vania da Deppo (18) , Björn Davidsson (19) , Stefano Debei (20) , Mariolino de Cecco (11) , Jakob Deller (1) , Lori M. Feaga (6) , H. Fisher (1) , Marco Fulle (21) , Adeline Gicquel (19) , O. Groussin (22) , Carsten Güttler (1) , Pedro J. Gutierrez (23) , Marc Hofmann (1) , K. Hornung (24) , Stubbe F. Hviid (25) , Wing-Huen Ip (26) , Laurent Jorda (22) , Horst Uwe Keller (27) , J. Kissel (1) , Jörg Knollenberg (25) , A. Koch (28) , Detlief Koschny (29) , Jörg Rainer Kramm (1) , Ekkehard Kührt (30) , M. Küppers (4) , Philippe Lamy (22) , Yves Langevin (31) , Luisa M. Lara (23) , Monica Lazzarin (15) , Zhong-Yi Lin (26) , J. J. Lopez Moreno (23) , Stephen C. Lowry (32) , Francesco Marzari (15) , S. Mottola (25) , Giampiero Naletto (5, 33) , Nilda Oklay (1) , J. Wm. Parker (13) , R. Rodrigo (34, 35) , J. Rynö (36) , Xian Shi (1) , O. Stenzel (1) , Cécilia Tubiana (1) , Jean-Baptiste Vincent (25) , H. A. Weaver (37) , B. Zaprudin (38)
1 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
2 DIST - Dipartimento di Scienze e Tecnologie [Napoli]
3 Department of Physics and Astronomy [Baltimore]
4 ESAC - European Space Astronomy Centre
5 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
6 Department of Astronomy [College Park]
7 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
8 MPIK - Max-Planck-Institut für Kernphysik
9 LASP - Laboratory for Atmospheric and Space Physics [Boulder]
10 IASF-Roma - Istituto di Astrofisica Spaziale e Fisica cosmica - Roma
11 ARC - NASA Ames Research Center
12 PARTHENOPE - Università degli Studi di Napoli “Parthenope” = University of Naples
13 Department of Space Studies [Boulder]
14 Physikalisches Institut [Bern]
15 Dipartimento di Fisica e Astronomia "Galileo Galilei"
16 PLANETO - LATMOS
17 OAPD - INAF - Osservatorio Astronomico di Padova
18 IFN - CNR Institute for Photonics and Nanotechnologies
19 JPL - Jet Propulsion Laboratory
20 Department of Industrial Engineering [Padova]
21 OAT - INAF - Osservatorio Astronomico di Trieste
22 LAM - Laboratoire d'Astrophysique de Marseille
23 IAA - Instituto de Astrofísica de Andalucía
24 Universität der Bundeswehr München [Neubiberg]
25 DLR Institut für Planetenforschung
26 IANCU - Institute of Astronomy [Taiwan]
27 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
28 von Hoerner und Sulger GmbH
29 ESTEC - European Space Research and Technology Centre
30 RSSD - Research and Scientific Support Department, ESTEC
31 IAS - Institut d'astrophysique spatiale
32 CAPS - Centre for Astrophysics and Planetary Science [Canterbury]
33 IFN - CNR Istituto di Fotonica e Nanotecnologie [Padova]
34 CAB - Centro de Astrobiologia [Madrid]
35 ISSI - International Space Science Institute [Bern]
36 FMI - Finnish Meteorological Institute
37 APL - Johns Hopkins University Applied Physics Laboratory [Laurel, MD]
38 Tuorla Observatory
Maurizio Pajola
Nicolas Thomas
Jean-Loup Bertaux
  • Function : Author
  • PersonId : 914210
Marco Fulle
  • Function : Author
  • PersonId : 980748
Wing-Huen Ip
Laurent Jorda
B. Zaprudin
  • Function : Author

Abstract

On 2016 July 03, several instruments onboard ESA's Rosetta spacecraft detected signs of an outburst event on comet 67P, at a heliocentric distance of 3.32 au from the Sun, outbound from perihelion. We here report on the inferred properties of the ejected dust and the surface change at the site of the outburst. The activity coincided with the local sunrise and continued over a time interval of 14–68 min. It left a 10-m-sized icy patch on the surface. The ejected material comprised refractory grains of several hundred microns in size, and sub-micron-sized water ice grains. The high dust mass production rate is incompatible with the free sublimation of crystalline water ice under solar illumination as the only acceleration process. Additional energy stored near the surface must have increased the gas density. We suggest a pressurized sub-surface gas reservoir, or the crystallization of amorphous water ice as possible causes.
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Dates and versions

obspm-02196759 , version 1 (03-12-2019)

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Jessica Agarwal, Vincenzo Della Corte, Paul D. Feldman, Bernhard Geiger, S. Merouane, et al.. Evidence of sub-surface energy storage in comet 67P from the outburst of 2016 July 03. Monthly Notices of the Royal Astronomical Society, 2017, 469 (Suppl_2), pp.s606-s625. ⟨10.1093/mnras/stx2386⟩. ⟨obspm-02196759⟩
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