Host: The Japanese Society for Planetary Sciences: Local Organizing Committee for 2006 Fall Meeting
We have examined if the shock-wave heating chondrule formation model forms compound chondrules. Especially, we focus on the formation process of compound chondrules by collisions. In the shock wave heating process, stripping off of liquid surface from partially molten dust particles, and the break up of totally molten particles can happen due to the gas dynamical pressure. The stripped off droplets and the fragments of the break up, which are called "secondary particles" here, are expected to have rather small relative velocity each other, that is needed to form compound chon-drules by collisions. Estimating the velocity of those particles based on a simple assumption that the maximum flow velocity in the liquid part of the molten particle determines the maximum velocity, we have found that the velocity is small enough for almost all the shock waves that can heat and melt the dust particles to form chondrules. Thus, it seems possible that collisions among secondary-secondary and primary-secondary dust particles would form compound chondrules.
