Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2016

Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko

1 IANCU - Institute of Astronomy [Taiwan]
2 Institute of Space Science [Taiwan]
3 Department of Mechanical Engineering [NCTU]
4 SSI - Space Science Institute [Macau]
5 Department of Atmospheric Sciences [Taoyuan City]
6 MPS - Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research
7 Dipartimento di Fisica e Astronomia "Galileo Galilei"
8 CISAS - Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”
9 ISSI - International Space Science Institute [Bern]
10 CAB - Centro de Astrobiologia [Madrid]
11 RSSD - Research and Scientific Support Department, ESTEC
12 CBK - Space Research Centre of Polish Academy of Sciences
13 IGEP - Institut für Geophysik und Extraterrestrische Physik [Braunschweig]
14 Department of Astronomy [College Park]
15 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
16 PLANETO - LATMOS
17 OAPD - INAF - Osservatorio Astronomico di Padova
18 IFN - CNR Institute for Photonics and Nanotechnologies
19 Department of Physics and Astronomy [Uppsala]
20 Department of Industrial Engineering [Padova]
21 University of Trento [Trento]
22 OAT - INAF - Osservatorio Astronomico di Trieste
23 LAM - Laboratoire d'Astrophysique de Marseille
24 IAA - Instituto de Astrofísica de Andalucía
25 DLR Institute of Planetary Research
26 ESAC - European Space Astronomy Centre
27 CAPS - Centre for Astrophysics and Planetary Science [Canterbury]
28 Department of Information Engineering
29 Physikalisches Institut [Bern]
Z.-Y. Lin
  • Function : Author
  • PersonId : 970780
Jean-Loup Bertaux
  • Function : Author
  • PersonId : 914210
Dennis Bodewits
  • Function : Author
  • PersonId : 991882
Olivier Groussin
  • Function : Author
  • PersonId : 837612
Pedro J. Gutiérrez
  • Function : Author
  • PersonId : 880386
Laurent Jorda
Michael Küppers
Philippe Lamy
  • Function : Author
  • PersonId : 994769

Abstract

We analyze the physical properties and dynamical origin of a curved jet of comet 67P/Churyumov-Gerasimenko that was observed repeatedly in several nucleus rotations starting on May 30 and persisting until early August, 2015. Methods. We simulated the motion of dust grains ejected from the nucleus surface under the influence of the gravity and viscous drag effect of the expanding gas flow from the rotating nucleus. Results. The formation of the curved jet is a combination of the size of the dust particles (~0.1−1 mm) and the location of the source region near the nucleus equator. This enhances the spiral feature of the collimated dust stream after the dust is accelerated to a terminal speed on the order of m s-1.
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Dates and versions

insu-01288643 , version 1 (15-03-2016)

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Z.-Y. Lin, I.-L. Lai, C.-C. Su, W.-H. Ip, J.-C. Lee, et al.. Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics - A&A, 2016, 588, pp.L3. ⟨10.1051/0004-6361/201527784⟩. ⟨insu-01288643⟩
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