Median companion frequency vs separation at star formation efficiency of 4.2%, averaged over an SFE ± 0.1% window, for the M_gas = 3750 M_⊙ simulation. The solid histograms in each panel show the resulting CF vs. separation histogram for the different settings summarised in Table 2. For settings with the luminosity limits, the blue and orange show the results with an upper limit of 55 and 120 L_⊙ respectively. The black dashed histogram shows the observed distribution found by Tobin et al. (2022) for all class 0/I objects, and the solid black line is the histogram derived from pairs with boundness likelihood > 0.68. The error bars are calculated using the binomial statistics described by Eq. (3) in Tobin et al. (2022).