Pop III.1 star formation rate. Calculated for weak and strong chemical feedback models and a moderate star formation efficiency with f_∗ = 0.05. The results are shown for v_wind = 50 km s^-1 , red line; and 100 km s^-1, blue line. We also show the theoretical SFRs in the literature, from Bromm & Loeb (2006) (Pop III.1+III.2), dotted black line; Trenti & Stiavelli (2009) (Pop III.2), dashed orange line; and Tornatore et al. (2007) (Pop III.1+III.2), dot-dashed brown line. The purple line is our optimistic model where we assume a very high star formation efficiency, f_∗ ~ 0.1, and low chemical enrichment, v_wind =  50 km s^-1.