Distribution of cells in the plane of gas temperature T and ionisation parameter ξ for the Picogna et al. (2021) analogue model (left) and our fiducial model (right). We only show cells that are not fixed to the initial T_DIAD. Overlaid are various parametrizations of the relationships between the variables: on the left, the yellow dash-dotted lines are the parametrizations for three different column densities from Ercolano et al. (2021); on the right, the yellow dash-dotted line is the lowest column density Ercolano et al. (2021) parametrization, the orange dashed line is from Haworth et al. (2016) and the white and pink solid lines are from this work. The other white lines delineate the unstable region in the Ercolano et al. (2021) prescription (dash-dotted) and lines of constant pressure at a given radius (dotted).