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Observations of the circumstellar disk in the Bok globule CB 26 at 110, 230,and 270 GHz are presented together with the results of the simulations andestimates of the disk parameters. These observations were obtained using theSMA, IRAM Plateau de Bure, and OVRO interferometers. The maps have relativelyhigh angular resolutions (0.4-1"), making it possible to study the spatialstructure of the gas-dust disk. The disk parameters are reconstructed via aquantitative comparison of observational and theoretical intensity maps. Thedisk model used to construct the theoretical maps is based on the assumption ofhydrostatic and radiative equilibrium in the vertical direction, while theradial surface density profile is described phenomenologically. The system ofequations for the transfer of the infrared and ultraviolet radiation is solvedin the vertical direction, in order to compute the thermal structure of thedisk. The disk best-fit parameters are derived for each map and all the mapssimultaneously, using a conjugate gradient method. The degrees of degeneracy ofthe parameters describing the thermal structure and density distribution of thedisk are analyzed in detail. All three maps indicate the presence of an innerdust-free region with a radius of approximately 35 AU, in agreement with theconclusions of other studies. The inclination of the disk is 78 deg, which issmaller than the value adopted in our earlier study of rotating molecularoutflows from CB 26. The model does not provide any evidence for the growth ofdust particles above a_max=0.02 cm.

Structure of CB 26 Protoplanetary Disk Derived from Millimeter Dust Continuum Maps