We have observed 51 high mass star forming cores associated with water masers at 350 \mu m. The spectral energy distributions ( SEDs ) and dust continuum normalized radial intensity profiles were modeled for 28 sources using a one-dimensional dust radiative transfer code assuming a power law density distribution in the envelope n = n _ { 0 } ( r / r _ { 0 } ) ^ { - p } .
The best fit density power law exponent , p , ranged from 1.0 to 2.5 with a mean value of p = 1.72 .
We determined the dust masses for the modeled cores and found a mean mass of 209 M _ { \hbox { $ \odot$ } } .