کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1775237 | 1021188 | 2007 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The shape, topography, and geology of Tempel 1 from Deep Impact observations
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
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چکیده انگلیسی
Deep Impact images of the nucleus of Comet Tempel 1 reveal pervasive layering, possible impact craters, flows with smooth upper surfaces, and erosional stripping of material. There are at least 3 layers 50-200 m thick that appear to extend deep into the nucleus, and several layers 1-20 m thick that parallel the surface and are being eroded laterally. Circular depressions show geographical variation in their forms and suggest differences in erosion rates or style over scales >1 km. The stratigraphic arrangement of these features suggests that the comet experienced substantial periods of little erosion. Smooth surfaces trending downslope suggest some form of eruption of materials from this highly porous object. The Deep Impact images show that the nucleus of Tempel 1 cannot be modeled simply as either an onion-layer or rubble pile structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 191, Issue 2, Supplement, 2007, Pages 51-62
Journal: Icarus - Volume 191, Issue 2, Supplement, 2007, Pages 51-62
نویسندگان
Peter C. Thomas, J. Veverka, Michael J.S. Belton, Alan Hidy, Michael F. A'Hearn, T.L. Farnham, Olivier Groussin, Jian-Yang Li, Lucy A. McFadden, Jessica Sunshine, Dennis Wellnitz, Carey Lisse, Peter Schultz, Karen J. Meech, W. Alan Delamere,