Formation of the Planetary Sequence in a Highly Flattened Disk of Frequently Colliding Planetesimals
Evgeny Griv, Michael Gedalin, Edward Liverts, David Eichler, Chi Yuan
Abstract
The kinetic theory is used to study the evolution of the self-gravitating disk of planetesimals. The effects of frequent collisions between planetesimals are taken into account by using a Krook integral in the Boltzmann kinetic equation. It is shown that as a result of an aperiodic collision-dissipative instability of small gravity disturbances the disk is subdivided into numerous dense fragments. These can eventually condense into the planetary sequence.
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