Evolution of the B − ρ slopes (κ₁,κ₂) and the slope, κ, from the single power-law fit as a function of time for model T (blue) and model R (green) for intermediate (left) and high densities (right). The different transition densities for the broken power-law fit are indicated as labels on the left. The definition of the broken power-law fit is given in Eq. (10). The shaded areas correspond to the standard deviation error on the slopes derived from the fit. The dashed black and red lines show the slopes of 1/2 and 2/3, respectively.