Spectra of protostellar models (see text). Top panel: for the fiducial accretion rate model with m_∗ = 10   M_⊙, the fluxes from the star and boundary layer are shown by the dashed and lower long-dashed lines, respectively. The lower solid line shows the flux from the accretion disk (integrating out to 5000 r_∗) assuming negligible protostellar heating, while the lower dotted line shows the case accounting for protostellar heating. The upper long-dashed, solid, and dotted lines show the equivalent quantities for the model with the accretion rate enhanced by a factor of 10. Bottom panel: the solid lines show for the fiducial m_∗ = 10   M_⊙ model the flux from the star + boundary layer, nonirradiated and irradiated accretion disks. The long-dashed, dotted, and dashed lines show the equivalent fluxes from the fiducial accretion rate models with m_∗ = 8,15, and 20   M_⊙, respectively. In all cases, the flux at 2.3 μm is dominated by disk emission.