Effect of the parameters v_corsini and R_cor on prominent synthetic emission lines of BAT99 7. Each of the upper panels depicts, for a constant value R_cor = R_∗, the synthetic profile of an emission line calculated with different v_corsini values. The bottom panels show the synthetic profile of the same spectral lines calculated with different R_cor values and with a constant rotational velocity of v_corsini = 2000 km s^-1.