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| 題名: | Observations and analysis of a curved jet in the coma of comet 67P/Churyumov-Gerasimenko |
| 作者: | 葉永烜;Lin, Z.-Y.;Lai, I.-L.;Su, C.-C.;Ip, W.-H.;Lee, 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.;Gutiérrez, P. J.;Güttler, C.;Hviid, S. F.;Jorda, L.;Knollenberg, J.;Kovacs, G.;Kramm, J.-R.;Kührt, E.;Küppers, M.;Lara, L. M.;Lazzarin, M.;López-Moreno, J. J.;Lowry, S.;Marzari, F.;Michalik, H.;Mottola, S.;Naletto, G.;Oklay, N.;Pajola, M.;Rożek, A.;Thomas, N.;Tubiana, C. |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Astrophysics;Comet heads;Comet nuclei;Comets;comets: individual: 67P/Churyumov-Gerasimenko;Curved;Dust;Earth and Planetary Astrophysics;Nuclei;Sciences of the Universe;Solar and Stellar Astrophysics;Spirals;Viscous drag |
| 日期: | 2016-04-01 |
| 上傳時間: | 2026-04-21 14:50:47 (UTC+8) |
| 出版者: | EDP Sciences |
| 摘要: | 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 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.
出版者： EDP Sciences
出版日期： 2016-04-01
出處： Astronomy and astrophysics (Berlin), 2016-04, Vol.588, p.L3
資源來源： EDP Sciences
版權： licence_http://creativecommons.org/publicdomain/zero
識別號： ISSN: 0004-6361
識別號： ISSN: 1432-0746
識別號： EISSN: 1432-0746
識別號： DOI: 10.1051/0004-6361/201527784 |
| 顯示於類別: | [天文研究所] 期刊論文
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