Supernova (SN)-driven pre-galactic outflows may be an efficient mechanism for distributing the product of stellar nucleosynthesis over large cosmological volumes prior to the reionization epoch. Here we present results from three-dimensional numerical simulations of the dynamics of SN-driven bubbles as they propagate through and escape the grasp of sub-galactic halos with masses M=108 h-1 Msun at redshift z=9. The hydrodynamic simulations use a nested grid method to follow the evolution of explosive multi-SN events operating on the characteristic timescale of a few × 107 yr, the lifetime of massive stars. The results show that, if the star formation efficiency of sub-galactic halos is <≈ 10%, a significant fraction of the halo gas will be lifted out of the potential well (`blow-away'), shock the intergalactic medium, and pollute it with metal-enriched material. Depending on the stellar distribution, we find that less than 30% of the available SN energy gets converted into kinetic energy of the blown away material, the remainder being radiated away.
8th Asian-Pacific Regional Meeting, Volume II
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