a) Temperature stratifications for two different PPM (blue line) and SphM (red line) stellar models with effective temperature of T_eff = 5000 K and log g = 4.5. b) Stratification of normalized absorption (solid line) and scattering (dashed line) opacities for PPM (blue) and SphM (red) of the stellar atmospheres with T_eff = 5000 K. c) Center-to-limb variation of intensity for PPM (blue line) and SphM (red line). d) Center-to-limb variation of polarization for PPM (blue line) and SphM (red line). The panels e)–h) show the same values as in a)–d), but for stellar models with T_eff = 6500 K and the same value of surface gravity, respectively.