论文标题
气象轰击
Meteoroid Bombardment of Lunar Poles
论文作者
论文摘要
虽然深伦纳尔火山口的地板在很大程度上被屏蔽了太阳辐射，从而为水冰积聚提供了理想的热环境，但高度倾斜的轨道上的流星物体可以轻松进入永久遮蔽的区域，并通过高速效应来改变表面特性。在这里，我们考虑了月球杆的详细地形和酿酒素的动力学模型，以量化流星质量通量，能量沉积和影响射流质量产量。我们对两个月球两极$ 5^\ Circ $内的区域的分析表明，Meteoroid质量通量，能量通量和弹出率的生产率的变化在其中位数的$ 50 \％$之内。我们发现，通过包括永久阴影区域在内的Meteoroid撞击可以轻松进入月球杆。我们发现表面斜率与流星喷射率之间存在正相关，这一发现表明，陡峭的火山口壁上的较高影响园艺率可以促进质量浪费。
While the floors of deep lunar craters are largely shielded from solar radiation and thus provide an ideal thermal environment for water ice accumulation, meteoroids on highly inclined orbits can easily access permanently shadowed regions and alter the surface properties via hyper-velocity impacts. Here we consider the detailed topography of lunar poles and a dynamical model of meteoroids to quantify the meteoroid mass fluxes, energy deposition, and impact ejecta mass production rates. Our analysis of regions within $5^\circ$ from the two lunar poles shows that the variations of the meteoroid mass flux, energy flux and ejecta production rate are within $50\%$ of their median values. We find that lunar poles are easily accessible by meteoroid impacts including permanently shadowed regions. We find a positive correlation between the surface slope and the meteoroid ejecta production rate, a finding that suggests a higher impact gardening rate on steep crater walls can facilitate mass wasting.
