Intensity profiles at 1.3 mm for all disks resulting from either a Gaussian fit (for the most compact disks) or a modified self-similar profile fit (Section 5.1). The colors of the curves correspond to the resultant 1.3–3 mm spectral index at each radii, except RCrA IRS7A due to the non-dust emission at 3 mm (Appendix B). The circles show the median value for the brightness temperature at certain radii. The dashed lines correspond to the theoretical approximation for the midplane temperature due to irradiation (T ∝ r^−0.5) considering the range of bolometric luminosities of the sample (see Section 5.5 for details).