Radiative energy exchange rate Q_i computed from the four model atmospheres using the opacity shown in Fig. B.1 and integrated over the interval λ ∈ [590, 600] nm. The values on the vertical axis are scaled with the factor indicated in the top left of each panel. Bottom left of each panel: deviation between the two ODFs computed using Eqs. 13, 14. Top right of each panel: ratio of the heating area with respect to the cooling area for the Q_i for both data sets (A for ATLAS and S for SYNSPEC).