Protostars and Planets VI, Heidelberg, July 15-20, 2013
EARLY HISTORY OF THE SOLAR SYSTEM
Vincke, Kirsten (Max-Plank-Institut für Radioastronomie, Bonn)
Pfalzner, Susanne (Max-Plank-Institut für Radioastronomie, Bonn)
Most likely the solar system was born in a stellar group containing at least a few 1000 members. This cluster environment probably influenced various properties of the solar system such as its chemical composition, size, and the orbital parameters of some of its constituting bodies. As in the Milky Way, clusters with more than 2000 stars only form in two types – starburst clusters and leaky clusters –, each following a unique temporal development in the mass-radius plane, the Sun must have formed in one of these two environments. We model the dynamics in these two cluster types from the embedded phase until the end of the gas expulsion phase using N-body methods. The effect of gravitational interactions between cluster members on young solar-type stars surrounded by discs is investigated in detail. Here we go beyond the usual approach of just considering encounters with other solar mass stars but cover the full spectrum of mass ratios such clusters provide.
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