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"Ejection
of material from a comet after its collision with a smaller body, probabilities
of collisions of migrating small bodies and dust particles with planets, and
formation of small body binaries" S.I. Ipatov (Catholic University
of America, Washington, USA) Abstract: The time variations
of velocities and relative amounts of material ejected from Comet 9P/Tempel 1
after its collision with the Deep Impact spacecraft are studied based on the
images made during this mission. The ejection of material could be considered
as a superposition of normal cratering and a triggered outburst from all
surface of the crater. The probabilities of collisions of different small
bodies (asteroids, comets, and trans-Neptunian objects) and dust particles of
different sizes produced by these bodies with all planets are considered for
dynamical lifetimes of bodies and particles. The formation of small body
binaries at the stage of rarefied preplanetesimals and the spin momenta of
collided preplanetesimals are studied. Papers and slides to presentations on
these items are presented on the website http://faculty.cua.edu/ipatov/. |
