4.5. Structural Information
From a careful study of the Table 4, the following comments can be made regarding the diagnostic value of the structural parameters `a' and `b'. The parameter `b' is extremely sensitive to the spectral type of the embedded star, for a wide range of 100 as well as the three density distributions (r0, r-1 & r-2). The parameter `a' is reasonably sensitive to the dust optical depth and can also distinguish between the constant density distribution from the rest.
So, in conclusion, the structure parameters have good diagnostic value for identifying type of embedded source and the optical depth, but regarding density distribution they can distinguish only between the r0 case from the rest (r-1 & r-2).