کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1778772 1523731 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Capillary action in a crack on the surface of asteroids with an application to 433 Eros
ترجمه فارسی عنوان
عمل مویرگی در یک ترک روی سطح سیارک ها با استفاده از اروس 433
کلمات کلیدی
سیستم سیارک؛ مکانیک کاپیلار؛ کشش سطحی؛ تعادل
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
چکیده انگلیسی


• The capillary action in a crack on the surface of irregular asteroids is discussed.
• The asteroid's irregular gravitational potential influences the height of the liquid in the capillary.
• Asteroid 433 Eros is taken as an example because the surface shape is irregular, elongated, and concave.
• The global maximum point for the height of the liquid in the capillary is on the concave area of asteroid 433 Eros.

Some asteroids contain water ice, and a space mission landing on an asteroid may take liquid to the surface of the asteroid. Gas pressure is very weak on the surface of asteroids. Here we consider the capillary action in a crack on the surface of irregular asteroids. The crack is modeled as a capillary which has a fixed radius. An asteroid's irregular gravitational potential influences the height of the liquid in the capillary. The height of the liquid in the capillary on the surface of such asteroids is derived from the asteroid's irregular gravitational potential. Capillary mechanisms are expected to produce an inhomogeneaous distribution of emergent liquid on the surface. This result is applied to asteroid 433 Eros, which has an irregular, elongated, and concave shape. Two cases are considered: (1) we calculate the height of the liquid in the capillary when the direction of the capillary is perpendicular to the local surface of the asteroid; (2) we calculate the height of the liquid in the capillary when the direction of the capillary is parallel to the vector from the center of mass to the surface position. The projected height in the capillary on the local surface of the asteroid seems to depend on the assumed direction of the capillary.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy - Volume 47, August 2016, Pages 91–96
نویسندگان
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