Parameter study exploring the isolated affects of four key parameters: Y_e (top left), ﹩\bar{v}﹩ (top right), β (bottom left), and M_ej (bottom right). The fiducial model is shown for comparison with a solid black line (﹩{M}_{{\rm{ej}}}\approx 1.2\times 1{0}^{-6},\,{Y}_{e}=0.40,\,\bar{v}=0.15,\,\beta =6﹩). For each model, the parameter labeled in the legend is the only one that is changed; all other parameters are held fixed at their fiducial value.