Comparison between the high resolution and low resolution simulations. Top: time evolution of the total mass of the system. The times at which new sink particles formed are indicated with star-shaped markers in the medium and low resolution simulations. We do not show the formation of sink particles for the high resolution simulations as fragmentation occurs almost instantly. Bottom: accretion rates onto the most massive surviving (non-ejected) sink particle. Also shown are the masses of the most massive surviving sink at the end of the simulations.