Angular dependence of emitted intensity (left panel) and PD (right panel). The angular dependence was normalized so that . Black, blue, green, orange, and red solid lines show the model for photon energies of 2, 5, 8, 12, and 18 keV, respectively. The black dot-dashed curves show the intensity and polarization corresponding to the classical results of Chandrasekhar–Sobolev (see Eq. (4)), corresponding to the optically thick electron-scattering dominated atmosphere. The grey dot-dashed curve in the left panel shows the angular dependence of intensity for unscattered photons. The model was calculated with the parameters shown in Table 1 (e.g. p_max = 0).