A statistical study of impact ejecta distribution around PHOBOS and Deimos

Details A statistical study of impact ejecta distribution around PHOBOS and Deimos A statistical study of impact ejecta distribution around PHOBOS and Deimos

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...90..237b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 90, April 1991, p. 237-253.

Mathematics

Probability

22

Deimos, Hypervelocity Impact, Micrometeoroids, Phobos, Satellite Surfaces, Statistical Analysis, Coriolis Effect, Gravitational Fields, Monte Carlo Method, Mars, Satellites, Phobos, Deimos, Statistical Methods, Impacts, Dust, Ejecta, Distribution, Particles, Parameters, Gravity Effects, Escape, Coriolis Force, Centrifugal Force, Monte Carlo Method, Regolith, Comparisons, Velocity, Density, Patterns, Trajectories, Calculations, Simulations, Dynamics, Patterns, Tidal Effects, Symmetry

Scientific paper

The present treatment of greater-than-1-mm particle-size impact-ejecta dynamics for Phobos and Deimos considers only the gravitational forces of Mars and its satellites and the centrifugal and Coriolis forces. Attention is given to two major factors of major significance for regolith formation: the escape probability from a given surface site, and the probability of reimpact; both of these functions vary significantly over the surfaces of the Martian satellites. The escape-probability differences between adjoining regions are greater for Phobos, although the reimpact probability variations for both satellites are considerable. The density trends are noted to become isotropic for greater launch velocities. While the overall dust-particle density is estimated to be a few hundred particles/cu km near the Phobos surface, the dust density around Deimos is 2-3 times larger.

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