Computer Science – Numerical Analysis
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994p%26ss...42..691i&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 42, no. 8, p. 691-697
Computer Science
Numerical Analysis
16
Astronomical Models, Interplanetary Dust, Mars (Planet), Mathematical Models, Numerical Analysis, Phobos, Planetary Rings, Sun, Density Distribution, Ejecta, Electromagnetic Interactions, Mass Distribution, Spatial Distribution
Scientific paper
Orbital evolution of impact ejecta with irregular shapes from phobos has been examined by numerical simulations, taking into account the gravity of the Sun, Mars and Phobos as well as the solar radiation pressure forces on them. In our simulations, a total of 300 particles with masses of 10-9, 10-8, and 10-7g are ejected from Phobons in random directions with mass-dependent ejection velocities by impacts of meteoroids periodically during 5 years. The ejection velocities are estimated from the collision experiments in a laboratory by Nakamura and Fujiwara. Considering the dilution processes through collisions with Mars and Phobos, the form of dust clouds surrounding Phobos orbit has been deduced based on the computed locations of test particles scattered around Mars at a certain time. We have found that the particles within a narrow mass distribution (nearly 10-9 g could make the dust rings, while other particles in the different mass region rapidly disappear. The number density of resulting ring particles is about 5 x10-12/ cu cm and a total mass of such rings is roughly 105.
Ishimoto Hidehiko
Mukai Tadashi
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