標題: Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko
作者: Lin, Z. -Y.
Lai, I. -L.
Su, C. -C.
Ip, W. -H.
Lees, J. -C.
Wu, J. -S.
Vincent, J. -B.
La Forgia, F.
Sierks, H.
Barbieri, C.
Lamy, P. L.
Rodrigo, R.
Koschny, D.
Rickman, H.
Keller, H. U.
Agarwal, J.
A\'Hearn, M. F.
Barucci, M. A.
Bertaux, J. -L.
Bertini, I.
Bodewits, D.
Cremonese, G.
Da Deppo, V.
Davidsson, B.
Debei, S.
De Cecco, M.
Fornasier, S.
Fulle, M.
Groussin, O.
Gutierrez, P. J.
Guettler, C.
Hviid, S. F.
Jorda, L.
Knollenberg, J.
Kovacs, G.
Kramm, J. -R.
Kuehrt, E.
Kueppers, M.
Lara, L. M.
Lazzarin, M.
Lopez-Moreno, J. J.
Lowry, S.
Marzari, F.
Michalik, H.
Mottola, S.
Naletto, G.
Oklay, N.
Pajola, M.
Rozek, A.
Thomas, N.
Tubiana, C.
機械工程學系
Department of Mechanical Engineering
關鍵字: comets: individual: 67P/Churyumov-Gerasimenko
公開日期: 四月-2016
摘要: Aims. 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 e ff ect 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 (similar to 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).
URI: http://dx.doi.org/10.1051/0004-6361/201527784
http://hdl.handle.net/11536/133668
ISSN: 1432-0746
DOI: 10.1051/0004-6361/201527784
期刊: ASTRONOMY & ASTROPHYSICS
Volume: 588
顯示於類別:期刊論文