Migration of Interplanetary Dust

Details Migration of Interplanetary Dust Migration of Interplanetary Dust

2003-08-25

arxiv.org/abs/astro-ph/0308450v1

Annals N.Y.Acad.Sci.1017:66-80,2004

Astronomy and Astrophysics

Astrophysics

Annals of the New York Academy of Sciences, 15 pages, 8 Figures, submitted

Scientific paper

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 1.1% for 100 micron particles to 0.008% for 1 micron particles. Almost all asteroidal particles with diameter d>4 microns collided with the Sun. The peaks in the migrating asteroidal dust particles' semi-major 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.

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