Table 3: Circinus model parameters: For an explanation of the parameters see Sect. 2 and Table 1. $M_{{\rm BH}}$ is the mass of the central black hole (from Greenhill et al. 2003) and $L_{{\rm disk}}/L_{{\rm edd}}$ is the Eddington luminosity ratio resulting for the assumed luminosity of the central source.
Parameter Value   Parameter Value
$R_{{\rm in}}$ 0.6 pc   $N_{{\rm clump}}$ 500
$R_{{\rm out}}$ 30 pc   $\beta$ 1.0
$\theta _{{\rm open}}$ $65\hbox{$^\circ$ }$   a0 0.2 pc
$\left<\tau_{9.7~\mu{\rm m}}^{{\rm equ}}\right>_{\phi}$ 3.9   $\tau_{9.7~\mu{\rm m}}^{{\rm clump}}$ 0.96
$M_{{\rm BH}}$ $1.7 \times 10^6~M_{\odot}$   $L_{{\rm disk}}/L_{{\rm edd}}$ 30%
$\alpha$ -0.5      

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