The difference in velocity dispersion between CDM and FDM models, as a function of radius. The orange dotted–dashed line corresponds to a 10¹¹ M_⊙ halo, similar to that inferred for Dragonfly 44. The blue dashed line corresponds to a 10¹² M_⊙ halo, and it demonstrates a much more detectable bump in the velocity dispersion inside of 1 kpc. The gray band indicates the observational uncertainties in velocity dispersion for the Dragonfly 44 data. Note that this uncertainty region does not take into account the systematic uncertainty in the halo mass profile from the unknown virial mass and concentration.