Astronomy & Astrophysics

All Figures

$\begin{figure} \par\includegraphics[width=8cm,clip]{1474fig1.ps} \end{figure}$ Figure 1: Inflowing velocity field for $\epsilon =0.5$ (dotted line), $\epsilon =2$ (dashed line), $\epsilon =4$ (solid line) and $\epsilon =6$ (dot-dashed line). As can be seen, we have kept the same phase for the 3 curves.
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In the text

$\begin{figure} \par\includegraphics[angle=90,width=12cm,clip]{1474fig2.ps}\end{figure}$ Figure 2: Density and velocity fields in the central region ( $4\times 4$ pc² around the center located at x=10 pc and y=10 pc) of the simulation box ( $20\times 20$ pc²) for $\epsilon =0.5$ (weakly turbulent flow) at time t=18.93 Myr. The longest arrow represents a velocity of about 15 km s^-1.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{1474fig3.ps} % \end{figure}$ Figure 3: Gas mass fraction in the pressure-density diagram for the $\epsilon =0.5$ simulation. The colours correspond respectively to gas mass fraction (in arbitrary units) of (1, 5, 10, 50, 100, 200, 1000) for (yellow, orange, red, green, dark blue, light blue, pink). The full black line is the thermal equilibrium curve. The green lines are the isothermal curves T=5000 K and T=200 K and the blue line is the Hugoniot curve of shocked gas corresponding to our initial conditions.
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In the text

$\begin{figure} \par\includegraphics[angle=90,width=11.4cm,clip]{1474fig4.ps}\end{figure}$ Figure 4: Density and velocity fields for a very turbulent forcing ( $\epsilon =4$ ). The longest arrow represents a velocity of about 17 km s^-1.
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In the text

$\begin{figure} \par\includegraphics[angle=90,width=11.4cm,clip]{1474fig5.ps}\end{figure}$ Figure 5: Spatial zoom of Fig. 4. The longest arrow represents a velocity of about 13 km s^-1.
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In the text

$\begin{figure} \par\includegraphics[angle=90,width=12cm,clip]{1474fig16.ps}\end{figure}$ Figure 6: Temperature and Mach number corresponding to Fig. 5. The longest arrow represents a Mach number of about 10.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{1474fig6.ps}\end{figure}$ Figure 7: Same as Fig. 3 for $\epsilon =4$ .
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In the text

$\begin{figure} \par\includegraphics[width=12cm,clip]{1474fig7.ps}\end{figure}$ Figure 8: Fraction of gas as a function of temperature, density and pressure for $\epsilon=0.5, ~ \epsilon=2$ , $\epsilon =4$ and $\epsilon =6$ at times t=11.6, 15.6 and 20 Myr.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{1474fig8.ps}\end{figure}$ Figure 9: Properties of CNM structures for the 3 cases $\epsilon =0.5$ (dashed line), $\epsilon =2$ (dot-dashed line) and $\epsilon =4$ (full line). The histograms display the density, temperature, pressure and velocity distributions as well as their variance, the size (in pixels) and the aspect ratio distribution. See text for definitions of these quantities.
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In the text

$\begin{figure} \begin{picture} (0,10)(-0.75,-1.25) \put(0.,3.84){\includegraphic... ...put(0.,0.){\includegraphics[width=7cm]{1474fig10.ps} } \end{picture}\end{figure}$ Figure 10: Evolution of the semi-analytical model for a model with $(\theta ,\Sigma ) = (0,0)$ ( bottom panel) and for the same model with $(\theta ,\Sigma ) = (0,0.8/\tau _{\rm cool})$ ( upper panel). The dashed lines are the 5000 K and 200 K isothermal curves.
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{1474fig11.ps}\end{figure}$ Figure 11: Time spent by the fluid particle in the thermally unstable domain (defined as $200~{\rm K} < T < 5000$ K) during its contraction as a function of $\Sigma$ . The 5 curves represent (from top to bottom) a Mach number of 1.2, 1.4, 1.6, 1.8 and 2.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{1474fig12.ps}\end{figure}$ Figure 12: Fraction of cold gas (full line) and fraction of thermally unstable gas plus cold gas (dashed line) as a function of $\langle \Sigma\rangle$ for the 4 cases $\epsilon =0.5$ , 2, 4 and 6 for various time steps. Each point corresponds to the average over several outputs of a simulation with a given $\epsilon$ and the error bars show the total dispersion of the results (100% of the points are within the error bar).
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{1474fig13.ps}\par\includegra... ...lip]{1474fig14.ps}\par\includegraphics[width=7cm,clip]{1474fig15.ps}\end{figure}$ Figure 13: Probability distribution function (pdf) of $\Sigma$ for $\epsilon =0.5$ (dashed line), $\epsilon =2$ (dotted line), $\epsilon =4$ (dashed-dotted line) and $\epsilon =6$ (full line). Upper panel is for the whole simulation, middle panel for cold gas only and lower panel for thermally unstable gas.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{1474fig1.ps} \end{figure}$	Figure 1: Inflowing velocity field for $\epsilon =0.5$ (dotted line), $\epsilon =2$ (dashed line), $\epsilon =4$ (solid line) and $\epsilon =6$ (dot-dashed line). As can be seen, we have kept the same phase for the 3 curves.
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$\begin{figure} \par\includegraphics[angle=90,width=12cm,clip]{1474fig2.ps}\end{figure}$	Figure 2: Density and velocity fields in the central region ( $4\times 4$ pc² around the center located at x=10 pc and y=10 pc) of the simulation box ( $20\times 20$ pc²) for $\epsilon =0.5$ (weakly turbulent flow) at time t=18.93 Myr. The longest arrow represents a velocity of about 15 km s^-1.
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$\begin{figure} \par\includegraphics[angle=90,width=11.4cm,clip]{1474fig4.ps}\end{figure}$	Figure 4: Density and velocity fields for a very turbulent forcing ( $\epsilon =4$ ). The longest arrow represents a velocity of about 17 km s^-1.
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$\begin{figure} \par\includegraphics[angle=90,width=11.4cm,clip]{1474fig5.ps}\end{figure}$	Figure 5: Spatial zoom of Fig. 4. The longest arrow represents a velocity of about 13 km s^-1.
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$\begin{figure} \par\includegraphics[angle=90,width=12cm,clip]{1474fig16.ps}\end{figure}$	Figure 6: Temperature and Mach number corresponding to Fig. 5. The longest arrow represents a Mach number of about 10.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{1474fig6.ps}\end{figure}$	Figure 7: Same as Fig. 3 for $\epsilon =4$ .
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$\begin{figure} \par\includegraphics[width=12cm,clip]{1474fig7.ps}\end{figure}$	Figure 8: Fraction of gas as a function of temperature, density and pressure for $\epsilon=0.5, ~ \epsilon=2$ , $\epsilon =4$ and $\epsilon =6$ at times t=11.6, 15.6 and 20 Myr.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{1474fig8.ps}\end{figure}$	Figure 9: Properties of CNM structures for the 3 cases $\epsilon =0.5$ (dashed line), $\epsilon =2$ (dot-dashed line) and $\epsilon =4$ (full line). The histograms display the density, temperature, pressure and velocity distributions as well as their variance, the size (in pixels) and the aspect ratio distribution. See text for definitions of these quantities.
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$\begin{figure} \begin{picture} (0,10)(-0.75,-1.25) \put(0.,3.84){\includegraphic... ...put(0.,0.){\includegraphics[width=7cm]{1474fig10.ps} } \end{picture}\end{figure}$	Figure 10: Evolution of the semi-analytical model for a model with $(\theta ,\Sigma ) = (0,0)$ ( bottom panel) and for the same model with $(\theta ,\Sigma ) = (0,0.8/\tau _{\rm cool})$ ( upper panel). The dashed lines are the 5000 K and 200 K isothermal curves.
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$\begin{figure} \par\includegraphics[width=7cm,clip]{1474fig11.ps}\end{figure}$	Figure 11: Time spent by the fluid particle in the thermally unstable domain (defined as $200~{\rm K} < T < 5000$ K) during its contraction as a function of $\Sigma$ . The 5 curves represent (from top to bottom) a Mach number of 1.2, 1.4, 1.6, 1.8 and 2.
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$\begin{figure} \par\includegraphics[width=7cm,clip]{1474fig13.ps}\par\includegra... ...lip]{1474fig14.ps}\par\includegraphics[width=7cm,clip]{1474fig15.ps}\end{figure}$	Figure 13: Probability distribution function (pdf) of $\Sigma$ for $\epsilon =0.5$ (dashed line), $\epsilon =2$ (dotted line), $\epsilon =4$ (dashed-dotted line) and $\epsilon =6$ (full line). Upper panel is for the whole simulation, middle panel for cold gas only and lower panel for thermally unstable gas.
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