All Figures

$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig1.ps} \end{figure}$ Figure 1: Schematic of torus evolution scenarios: Torus mass accretion rate ( $M_{\odot }$ yr^-1) is plotted as a function of time (Myr). Phase I: a massive ( $Q \sim 1$ ) turbulent disk is associated with a starburst. Phase II: a collisional torus evolves at a constant turbulent velocity dispersion, i.e. thick torus evolution. Phase III: the torus becomes thin and evolves at an approximately constant gas mass.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig2.ps} \end{figure}$ Figure 2: Ratio between the mass accretion rate of the present collisional torus and that of the initial collisional torus (end of Phase I and beginning of Phase II) as a function of time. The zero point in time is the end of Phase I ( ${\vartheta =1}$ for Circinus).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig3a.eps}\par\vspace*{2mm} \includegraphics[width=8cm,clip]{10446fig3b.eps} \end{figure}$ Figure 3: Projected mean number of clouds $\Lambda$ along the line of sight through the torus for the screen model. Contour levels are (0.5, 0.75, 1, 1.5, 2, 2.5, 3, ...). The thick contour is for $\Lambda =1$ corresponding to an non obscuration probability of e^-1. Upper panel: torus inclination $i=45^{\circ }$ . Lower panel: torus inclination $i=60^{\circ }$ (i measured from the torus axis). The size of the box is 100 pc.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig4.eps} \end{figure}$ Figure 4: Ratio between the extinction-free starburst emission to the emission with cloud absorption $I_0/I_{\rm ext}$ for an torus inclination of $i=50^{\circ }$ . Contour levels are (1.5, 2, 2.5). The thick contour is for $I_0/I_{\rm ext}=2$ . It is the seconds outermost contour.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig5.ps} \end{figure}$ Figure 5: Ratio between the mass accretion rate onto the central black hole and the present torus mass accretion rate as a function the area filling factor, i.e. $\Phi _{\rm A}=4/3/\vartheta$ .
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig2.ps} \end{figure}$	Figure 2: Ratio between the mass accretion rate of the present collisional torus and that of the initial collisional torus (end of Phase I and beginning of Phase II) as a function of time. The zero point in time is the end of Phase I ( ${\vartheta =1}$ for Circinus).
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$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig4.eps} \end{figure}$	Figure 4: Ratio between the extinction-free starburst emission to the emission with cloud absorption $I_0/I_{\rm ext}$ for an torus inclination of $i=50^{\circ }$ . Contour levels are (1.5, 2, 2.5). The thick contour is for $I_0/I_{\rm ext}=2$ . It is the seconds outermost contour.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{10446fig5.ps} \end{figure}$	Figure 5: Ratio between the mass accretion rate onto the central black hole and the present torus mass accretion rate as a function the area filling factor, i.e. $\Phi _{\rm A}=4/3/\vartheta$ .
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