Ipatov S I, Mather J C, Taylor P A
NASA/GSFC, Mail Code 685, Greenbelt, MD 20771, USA.
Ann N Y Acad Sci. 2004 May;1017:66-80. doi: 10.1196/annals.1311.005.
We numerically investigate the migration of dust particles with initial orbits close to those of the numbered asteroids, observed trans-Neptunian objects, and comet Encke. The fraction of silicate asteroidal particles that collided with the Earth during their lifetime varied from 11% for 100 micron particles to 0.008% for 1 micron particles. Almost all asteroidal particles with diameter d >/= 4 microns collided with the Sun. For migrating asteroidal dust particles, the peaks in semimajor axis distribution at the n:(n + 1) resonances with Earth and Venus, and the gaps associated with the 1:1 resonances with these planets are more pronounced for larger particles. The probability of collisions of cometary particles with the Earth is smaller than for asteroidal particles, and this difference is greater for larger particles.
我们对初始轨道接近编号小行星、已观测到的海王星外天体以及恩克彗星的尘埃颗粒迁移进行了数值研究。硅酸盐小行星颗粒在其寿命期间与地球碰撞的比例，从100微米颗粒的11%到1微米颗粒的0.008%不等。几乎所有直径d≥4微米的小行星颗粒都与太阳发生了碰撞。对于迁移的小行星尘埃颗粒，在与地球和金星的n:(n + 1)共振处的半长轴分布峰值，以及与这些行星的1:1共振相关的间隙，对于较大颗粒更为明显。彗星颗粒与地球碰撞的概率小于小行星颗粒，并且这种差异对于较大颗粒更大。
