کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1780951 1523924 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photoelectric dust levitation around airless bodies revised using realistic photoelectron velocity distributions
ترجمه فارسی عنوان
پراکندگی گرد و غبار عکس در اطراف بدن بدون هوا با استفاده از توزیع سرعت نور عکسالعمر بازنگری شده است
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
چکیده انگلیسی
In this study, we develop a new analytical method to calculate an angle-resolved velocity distribution function of photoelectrons from the laboratory measurement data. We find that the photoelectric current and yield for lunar surface fines measured in a laboratory have been underestimated by a factor of two. We apply our new energy distribution function of photoelectrons to model the formation of photoelectric sheath above the surface of asteroid 433 Eros. Our model shows that a 0.1 μm-radius dust grain can librate above the surface of asteroid 433 Eros regardless of its launching velocity. In addition, a 0.5 μm grain can hover over the surface if the grain was launched at a velocity slower than 0.4 m/s, which is a more stringent condition for levitation than previous studies. However, a lack of high-energy data on the photoelectron energy distribution above 6 eV prevents us from firmly placing a constraint on the levitation condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Planetary and Space Science - Volume 116, October 2015, Pages 18-29
نویسندگان
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