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

Z.-Y. Lin
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  • PersonId : 970780
Jean-Loup Bertaux
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  • PersonId : 914210
Dennis Bodewits
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  • PersonId : 991882
Olivier Groussin
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  • PersonId : 837612
Pedro J. Gutiérrez
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  • PersonId : 880386
Laurent Jorda
Michael Küppers
Philippe Lamy
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  • PersonId : 994769
Nilda Oklay
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  • PersonId : 976656

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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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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