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https://ir.lib.ncu.edu.tw/handle/987654321/101750
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| 题名: | Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko |
| 作者: | 葉永烜;Groussin, O.;Sierks, H.;Barbieri, C.;Lamy, P.;Rodrigo, R.;Koschny, D.;Rickman, H.;Keller, H. U.;A’Hearn, M. F.;Auger, A.-T.;Barucci, M. A.;Bertaux, J.-L.;Bertini, I.;Besse, S.;Cremonese, G.;Da Deppo, V.;Davidsson, B.;Debei, S.;De Cecco, M.;El-Maarry, M. R.;Fornasier, S.;Fulle, M.;Gutiérrez, P. J.;Güttler, C.;Hviid, S.;Ip, W.-H;Jorda, L.;Knollenberg, J.;Kovacs, G.;Kramm, J. R.;Kührt, E.;Küppers, M.;Lara, L. M.;Lazzarin, M.;Lopez Moreno, J. J.;Lowry, S.;Marchi, S.;Marzari, F.;Massironi, M.;Mottola, S.;Naletto, G.;Oklay, N.;Pajola, M.;Pommerol, A.;Thomas, N.;Toth, I.;Tubiana, C.;Vincent, J.-B. |
| 贡献者: | 理學院天文研究所 |
| 关键词: | Astronomy;Astrophysics;Cameras;Carbon dioxide;Comet nuclei;comets: general;comets: individual: 67P/Churyumov-Gerasimenko;methods: data analysis;Onboard;Physics;Sublimation;Surface chemistry;Temporal logic |
| 日期: | 2015-11-01 |
| 上传时间: | 2026-04-21 14:42:57 (UTC+8) |
| 出版者: | EDP Sciences |
| 摘要: | 摘要： Aims. We report on the first major temporal morphological changes observed on the surface of the nucleus of comet 67P/Churyumov-Gerasimenko in the smooth terrains of the Imhotep region. Methods. We used images of the OSIRIS cameras onboard Rosetta to follow the temporal changes from 24 May 2015 to 11 July 2015. Results. The morphological changes observed on the surface are visible in the form of roundish features that are growing in size from a given location in a preferential direction at a rate of 5.6–8.1 × 10-5 m s-1 during the observational period. The location where the changes started and the contours of the expanding features are bluer than the surroundings, which suggests that ices (H2O and/or CO2) are exposed on the surface. However, sublimation of ices alone is not sufficient to explain the observed expanding features. No significant variations in the dust activity pattern are observed during the period of changes.
出版者： EDP Sciences
出版日期： 2015-11-01
出處： Astronomy & Astrophysics, 2015-11, Vol.583, p.A36-
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: 10.1051/0004-6361/201527020 |
| 显示于类别: | [天文研究所] 期刊論文
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