Tracer fluid distribution for simulations with different core masses. After thermodynamic equilibrium is reached, the Hill sphere is initialized with a tracer density of unity and is evolved for an additional . The length unit for all panels is R_Hill, which scales with the mass of the core. Because we assumed the same density for all cores, the cores have the same radius in units of R_Hill. Top panel: tracer fluid density in the midplane. Bottom panel: tracer fluid density in the xy-plane seen from the front.