Dependence of the ratio of FWHM/σ_line on the initial physical parameters for the solar (upper panel) and five times solar metallicity (lower panel). The red, green, and blue solid lines represents the viewing angles of 15, 30, and 45 deg, respectively. The diamonds, circles, and squares stand for the Eddington rates of 0.01, 0.1, and 1, respectively. The values of 2.3548 and zero expected for a Gaussian and Lorentzian profile are depicted by black solid and black dashed lines, respectively, for a reference.