کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8136097 1523533 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The stratification of regolith on celestial objects
ترجمه فارسی عنوان
طبقه بندی رگولیت بر روی اشیاء آسمانی
کلمات کلیدی
سیارک ها، دنباله دار هسته،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
چکیده انگلیسی
All atmosphere-less planetary bodies are covered with a dust layer, the so-called regolith, which determines the optical, mechanical and thermal properties of their surface. These properties depend on the regolith material, the size distribution of the particles it consists of, and the porosity to which these particles are packed. We performed experiments in parabolic flights to determine the gravity dependency of the packing density of regolith for solid-particle sizes of 60 μm and 1 mm as well as for 100-250 μm-sized agglomerates of 1.5 μm-sized solid grains. We utilized g-levels between 0.7 m s−2 and 18 m s−2 and completed our measurements with experiments under normal gravity conditions. Based on previous experimental and theoretical literature and supported by our new experiments, we developed an analytical model to calculate the regolith stratification of celestial rocky and icy bodies and estimated the mechanical yields of the regolith under the weight of an astronaut and a spacecraft resting on these objects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 257, 1 September 2015, Pages 33-46
نویسندگان
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