Density and dust temperature profile along the line-of-sight towards the two hot cores Sgr B2(N) (top) and Sgr B2(M) (bottom). This is obtained with a pixel resolution of 0.5′′ . The left panels show the profile along 2 pc around the hot cores, whereas the panels on the right show a zoom-in view of the inner 0.4 pc. The solid lines show the resulting distributions when including the star clusters. In addition, we show the temperature profile for the same model but without the extrapolated population of low- and intermediate-mass stars (dotted line). The bottom panel of each plot shows the residuals.