کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1774650 1523566 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spin rates of fast-rotating asteroids and fragments in impact disruption
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
Spin rates of fast-rotating asteroids and fragments in impact disruption
چکیده انگلیسی

We present a new experimental result of fragment spin-rate in impact disruption, using a thin glass plate. A cylindrical projectile impacts on a side (edge) of the plate. Dispersed fragments are observed using a high-speed camera and the spin rates of fragments are measured. We find that the measured fragment spin-rate decreases with increasing size. Assuming that the rotational energy of fragments is supplied from the residual stress, the spin rate ω decreases with increasing fragment size r   as ω∼r−1ω∼r−1, which explains the above experimental results. This size-dependence is similar to that of the observed spin rates of small fast-rotating asteroids. Our results suggest that spin rates of fragments of small asteroids immediately after disruption may have a similar size-dependence, and can provide constraints on the subsequent spin-state evolution of small asteroids due to thermal torques.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 200, Issue 2, April 2009, Pages 694–697
نویسندگان
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