Our assumed circular velocity curve for the Milky Way, together with a band showing the 1σ scatter in the posterior distribution of ΛCDM models constrained by the observational data points shown, with their adopted error bars, in orange, red, and green. The solid blue curve is the mean of the posterior circular velocity distribution at each radius. The error bar of the Callingham et al. (2019) estimate is diagonal since they estimated the virial mass and a lower mass results in a lower virial radius.