کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8136090 1523530 2015 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comet 67P/Churyumov-Gerasimenko: Hardening of the sub-surface layer
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
Comet 67P/Churyumov-Gerasimenko: Hardening of the sub-surface layer
چکیده انگلیسی
From the operation of the MUPUS thermal probe Spohn et al. (2015) concluded that the material of the nucleus of 67P/Churyumov-Gerasimenko is likely to have a high strength, at least locally at the Philae landing site. In this work we consider the derived strength of the material in order to constrain its granulation. For this purpose we performed numerical simulations of the long-term sintering of ice-dust granular mixtures of different granulation, covered by a dust mantle. The dust mantle has a thickness of 0-16 cm, and a (pore size and temperature-dependent) thermal conductivity. According to our simulations a hardened layer at least a meter thick forms beneath the dust only when the grains are tens of microns in radius, or smaller.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 260, 1 November 2015, Pages 464-474
نویسندگان
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