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| 題名: | Rotating dust particles in the coma of comet 67P/Churyumov-Gerasimenko |
| 作者: | 葉永烜;Fulle, M.;Ivanovski, S. L.;Bertini, I.;Gutierrez, P.;Lara, L.;Sierks, H.;Zakharov, V.;Della Corte, V.;Rotundi, A.;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.;Bodewits, D.;Cremonese, G.;Da Deppo, V.;Davidsson, B.;Debei, S.;De Cecco, M.;Fornasier, S.;Groussin, O.;Güttler, C.;Hviid, S. F.;Ip, W.;Jorda, L.;Knollenberg, J.;Kramm, R.;Kührt, E.;Küppers, M.;Lazzarin, M.;Lopez-Moreno, J. J.;Marzari, F.;Michalik, H.;Naletto, G.;Oklay, N.;Sabau, L.;Thomas, N.;Tubiana, C.;Vincent, J.-B.;Wenzel, K.-P. |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Astrophysics;Atmospheric and Oceanic Physics;Comet heads;comets: general;comets: individual: 67P/Churyumov-Gerasimenko;Dust;Grains;Mathematical models;methods: numerical;Physics;Rotating;Rotational;space vehicles;Spacecraft motion;Statistics |
| 日期: | 2015-11-01 |
| 上傳時間: | 2026-04-21 14:41:38 (UTC+8) |
| 出版者: | EDP Sciences |
| 摘要: | 摘要： Context. During September and October 2014, the OSIRIS cameras onboard the ESA Rosetta mission detected millions of single particles. Many of these dust particlesappear as long tracks (due to both the dust proper motion and the spacecraft motion during the exposure time) with a clear brightness periodicity. Aims. We interpret the observed periodic features as a rotational and translational motion of aspherical dust grains. Methods. By counting the peaks of each track, we obtained statistics of a rotation frequency. We compared these results with the rotational frequency predicted by a model of aspherical dust grain dynamics in a model gas flow. By testing many possible sets of physical conditions and grain characteristics, we constrained the rotational properties of dust grains. Results. We analyzed on the motion of rotating aspherical dust grains with different cross sections in flow conditions corresponding to the coma of 67P/Churyumov-Gerasimenko qualitatively and quantitatively. Based on the OSIRIS observations, we constrain the possible physical parameters of the grains.
出版者： EDP Sciences
出版日期： 2015-11-01
出處： Astronomy and astrophysics (Berlin), 2015-11, Vol.583, p.A14
資源來源： EDP Sciences
版權： CC0 1.0 - Universal
識別號： ISSN: 0004-6361
識別號： ISSN: 1432-0746
識別號： EISSN: 1432-0746
識別號： DOI: 10.1051/0004-6361/201526158 |
| 顯示於類別: | [天文研究所] 期刊論文
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