Massive protostar companion YSO surface number density analysis. Left: K-band LUCI-1 SOUL AO image of the central region of AFGL 5180. NIR sources are shown as blue dots and ALMA sources as red dots. ALMA FOVs for Bands 6 and 7 are shown as white solid and dotted circles, respectively. Annuli in which stellar surface densities have been sampled are shown as red circles. Right: radial surface number densities derived from the NIR + ALMA (black squares) and ALMA-only (black triangles). Poisson uncertainties are indicated by the error bars. Data from the STARFORGE simulation (Grudić et al. 2022) is shown by the red lines and symbols, as labeled (see text). Turbulent Clump model of protocluster formation from Farias & Tan (2023) is shown by the purple lines and symbols, as labeled (see text).