Table 1: Main model parameters for our continuous and clumpy
standard model.
Both models    
inner radius of the torus $R_{{\rm in}}$ 0.4 pc
outer radius of the torus $R_{{\rm out}}$ 50 pc
half opening angle of the torus $\theta _{{\rm open}}$ $45\hbox {$^\circ $ }$
total optical depth in equatorial plane $\left<\tau_{9.7~\mu{\rm m}}^{{\rm equ}}\right>_{\phi}$ 2.0
exponent of continuous density distribution $\alpha$ -0.5
number of grid cells in r direction   97
number of grid cells in $\theta $ direction   31
number of grid cells in $\phi $ direction   120
Additional in clumpy model    
number of clumps $N_{{\rm clump}}$ 400
exponent of clump size distribution $\beta$ 1.0
constant of clump size distribution a0 0.2 pc
optical depth of each clump $\tau_{9.7~\mu{\rm m}}^{{\rm clump}}$ 0.38
average number of cells per clump   272

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