Number density of the coronal gas as a function of radius. The black dashed line is the median model obtained by fitting a beta model to Milky Way coronal gas observations (upward pointing triangles with errorbars) using a Markov chain Monte Carlo algorithm. The coloured shaded area represents the 3σ region. Observations, which should be considered as lower limits for the coronal density, are taken from Putman et al. (2021).