SEDs of a 2 M_⊙ PMS star surrounded by a passively heated gas/dust disk. We used a range of luminosities and temperatures (see Table B.1) representative of the evolution along a Siess et al. (2000) evolutionary track. The vertical flux scale is normalized to its maximum value for each model. Disk parameters are listed in Table B.2. The dashed line indicates the 7 μm excess point. Lower right panel: effect of increasing the disk scale height at 0.4 AU from 0.041 to 0.08 AU for the T_eff = 9080 K model.