Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/101750

Title:	Temporal morphological changes in the Imhotep region of comet 67P/Churyumov-Gerasimenko
Authors:	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.
Contributors:	理學院天文研究所
Keywords:	Astronomy;Astrophysics;Cameras;Carbon dioxide;Comet nuclei;comets: general;comets: individual: 67P/Churyumov-Gerasimenko;methods: data analysis;Onboard;Physics;Sublimation;Surface chemistry;Temporal logic
Date:	2015-11-01
Issue Date:	2026-04-21 14:42:57 (UTC+8)
Publisher:	EDP Sciences
Abstract:	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
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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