All Figures

$\begin{figure} \par\includegraphics[height=6.1cm,width=8cm,clip]{fig_07_n12c25x3... ...mm} \includegraphics[height=6.1cm,width=8cm,clip]{fig_H_n12c25x3.ps}\end{figure}$ Figure 1: Temperature and fractional ion abundances versus CD(z) for a model with $CD= 3\times 10^{25}$ cm^-2, $n_{\rm H}=10^{12}$ cm^-3, and an ionization parameter of $\xi =1000$ , photoionized by the standard continuum (Model 1). The thick dot-dashed line corresponds to the temperature. The top figure shows the fractional abundances of the oxygen ions, the middle one the fractional abundances of the He-like ions, and the bottom one, the fractional abundances of the H-like ions.
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In the text

$\begin{figure} \par\includegraphics[height=6cm,width=8cm,clip]{fig_07_n7c23x2.ps... ...*{4mm} \includegraphics[height=6cm,width=8cm,clip]{fig_H_n7c23x2.ps}\end{figure}$ Figure 2: Same caption as Fig. 1, for a model with CD=10 ²³ cm^-2, $n_{\rm H}=10^{7}$ cm^-3, and $\xi =100$ (Model 2).
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In the text

$\begin{figure} \par\includegraphics[height=6.1cm,width=8cm,clip]{fig_07_n7c23xeq... ...m} \includegraphics[height=6.1cm,width=8cm,clip]{fig_H_n7c23xeq2.ps}\end{figure}$ Figure 3: Same caption as Fig. 1, for a model with CD=10²³ cm^-2, a density of $n_{\rm H}=^{7}$ cm^-3, photoionized by the AGN continuum with $\xi _{{\rm eq}}=100$ .
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In the text

$\begin{figure} \par\includegraphics[width=16.2cm,clip]{colion_He.ps}\vspace*{5mm} \includegraphics[width=16.2cm,clip]{colion_H.ps}\end{figure}$ Figure 4: Column densities of a few He-like and H-like species versus the total column density, for different values of $\xi$ , for the standard continuum. These curves are independent of the density (from 10⁷ to 10¹² cm^-3). The diamond corresponds to a slab photoionized by the AGN continuum with $\xi _{{\rm eq}}=100$ . The long dashed line marks the column density of 10¹⁷ cm^-2.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{h4709f5.eps}\end{figure}$ Figure 5: Maximum temperatures of the regions where OVII and OVIII are dominant, as a function of the OVII column density in cm^-2, for all models (these values almost do not depend of densities from 10⁷ to 10¹² cm^-3). Solid lines: $T_{{\rm max}}$ (OVIII). Thick dashed lines: $T_{{\rm max}}$ (OVII). The labels on the curves give the value of $\xi$ . Thin dot-dashed lines: $T_{{\rm max}}$ (OVII) for a given value of of CD (indicated in logarithms on the curves). Isolated points correspond to the AGN continuum for CD=10²³ cm^-2: squares: $\xi _{{\rm eq}}=200$ ; circles: $\xi _{{\rm eq}}=100$ . The limit of CD(OVII)/ $T_{{\rm max}}$ (OVII) is given by the very thick line.
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In the text

$\begin{figure} {\psfig{figure=fig-Wev-total-x1000.eps,width=6.85cm,height=6.2cm}... ... {\psfig{figure=fig-Wev-total-x300.eps,width=6.85cm,height=6.2cm} } \end{figure}$ Figure 6: EWs of the sum w+x+y+z for all the He-like species and for $\xi =1000$ and 300, versus the column density of the slab, for the standard continuum, when it is seen directly. The EWs are independent of the density; solid line: C; large dashes: N; thick solid line: O; small dashes: Ne; very small dashes: Mg; dashes and dots: Si; dashes and 3 dots: S; dots: Fe.
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In the text

$\begin{figure} {\psfig{figure=fig-Wev-total-x100.eps,width=7.15cm,height=6.7cm} ... ...} {\psfig{figure=fig-Wev-total-x30.eps,width=7.15cm,height=6.7cm} } \end{figure}$ Figure 7: Same caption as 6, but for $\xi =100$ and 30. Symbols refer to the AGN model with $\xi _{{\rm eq}}=100$ .
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In the text

$\begin{figure} \par\includegraphics[height=6.65cm,width=7.65cm,clip]{fig-Wev-OVII-total.eps}\end{figure}$ Figure 8: EWs of the sum of the OVII triplet for several values of the ionization parameter, including all densities from 10⁷ to 10¹² cm^-3, versus the column density of the slab. The curves are labelled with the value of $\xi$ . The squares correspond to the AGN spectrum, with $\xi _{{\rm eq}}$ indicated.
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In the text

$\begin{figure} \par\includegraphics[width=14.85cm,clip]{Rapport_G.ps}\end{figure}$ Figure 9: G ratio as a function of the column density CD for different values of the ionization parameter $\xi$ , and for the standard continuum. The diamond corresponds to the AGN continuum, for $\xi _{{\rm eq}}=100$ .
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In the text

$\begin{figure} \par\includegraphics[height=7cm,width=7.15cm,clip]{R_vs_xi.ps}\end{figure}$ Figure 10: R ratios for OVII and SiXIII as a function of the ionization parameter, for a density of 10⁷ cm^-3, and for the standard continuum. Solid curves: CD=10²³ cm^-2; dashed curves: CD=10¹⁸ cm^-2.
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In the text

$\begin{figure} \par\includegraphics[height=5.85cm,width=7.5cm,clip]{Rapport_R.ps}\end{figure}$ Figure 11: R ratios for OVII and FeXXV as a function of the density, for two values of the column density and of the ionization parameter, for the standard continuum.
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In the text

$\begin{figure} \par\includegraphics[width=13cm,clip]{Spectre_raie07_n7.ps}\end{figure}$ Figure 12: Spectrum showing the OVII triplet for several values of the column density and of the ionization parameter. The influence of an increasing column density at a given ionization parameter is shown on the left panels, and the influence of an increasing ionization parameter at a given column density is shown on the right panel.
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In the text

$\begin{figure} \par\includegraphics[width=13cm,clip]{Spectre_raieSi13_n7.ps}\end{figure}$ Figure 13: Same caption as Fig. 12 but for the SiXIII triplet.
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In the text

$\begin{figure} \par\includegraphics[height=4.2cm,width=8.8cm,clip]{spec_AGN_n7c2... ...mm} \includegraphics[height=4.2cm,width=8.8cm,clip]{spec_n7c21x1.ps}\end{figure}$ Figure 14: A few examples of reflected spectra: from top to bottom: 1. AGN continuum, $n_{\rm H}=10^{7}$ cm^-3, CD=10²³ cm^-2, and $\xi _{{\rm eq}}=2000$ ; 2: AGN continuum, $n_{\rm H}=10^{7}$ cm^-3, CD=10²³ cm^-2, and $\xi _{{\rm eq}}=600$ ; 3: AGN continuum, $n_{\rm H}=10^{7}$ cm^-3, CD=10²³ cm^-2, and $\xi _{{\rm eq}}=200$ ; 4: standard continuum, $n_{\rm H}=10^{7}$ cm^-3, CD=10²² cm^-2, and $\xi =30$ ; 5: standard continuum, $n_{\rm H}=10^{7}$ cm^-3, CD=10²¹ cm^-2, and $\xi =10$ .
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In the text

$\begin{figure} \par\includegraphics[height=6cm,width=8cm,clip]{fig_07_n7c23x2.ps... ...*{4mm} \includegraphics[height=6cm,width=8cm,clip]{fig_H_n7c23x2.ps}\end{figure}$	Figure 2: Same caption as Fig. 1, for a model with CD=10 ²³ cm^-2, $n_{\rm H}=10^{7}$ cm^-3, and $\xi =100$ (Model 2).
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$\begin{figure} \par\includegraphics[height=6.1cm,width=8cm,clip]{fig_07_n7c23xeq... ...m} \includegraphics[height=6.1cm,width=8cm,clip]{fig_H_n7c23xeq2.ps}\end{figure}$	Figure 3: Same caption as Fig. 1, for a model with CD=10²³ cm^-2, a density of $n_{\rm H}=^{7}$ cm^-3, photoionized by the AGN continuum with $\xi _{{\rm eq}}=100$ .
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$\begin{figure} \par\includegraphics[width=16.2cm,clip]{colion_He.ps}\vspace*{5mm} \includegraphics[width=16.2cm,clip]{colion_H.ps}\end{figure}$	Figure 4: Column densities of a few He-like and H-like species versus the total column density, for different values of $\xi$ , for the standard continuum. These curves are independent of the density (from 10⁷ to 10¹² cm^-3). The diamond corresponds to a slab photoionized by the AGN continuum with $\xi _{{\rm eq}}=100$ . The long dashed line marks the column density of 10¹⁷ cm^-2.
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$\begin{figure} {\psfig{figure=fig-Wev-total-x1000.eps,width=6.85cm,height=6.2cm}... ... {\psfig{figure=fig-Wev-total-x300.eps,width=6.85cm,height=6.2cm} } \end{figure}$	Figure 6: EWs of the sum w+x+y+z for all the He-like species and for $\xi =1000$ and 300, versus the column density of the slab, for the standard continuum, when it is seen directly. The EWs are independent of the density; solid line: C; large dashes: N; thick solid line: O; small dashes: Ne; very small dashes: Mg; dashes and dots: Si; dashes and 3 dots: S; dots: Fe.
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$\begin{figure} {\psfig{figure=fig-Wev-total-x100.eps,width=7.15cm,height=6.7cm} ... ...} {\psfig{figure=fig-Wev-total-x30.eps,width=7.15cm,height=6.7cm} } \end{figure}$	Figure 7: Same caption as 6, but for $\xi =100$ and 30. Symbols refer to the AGN model with $\xi _{{\rm eq}}=100$ .
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$\begin{figure} \par\includegraphics[height=6.65cm,width=7.65cm,clip]{fig-Wev-OVII-total.eps}\end{figure}$	Figure 8: EWs of the sum of the OVII triplet for several values of the ionization parameter, including all densities from 10⁷ to 10¹² cm^-3, versus the column density of the slab. The curves are labelled with the value of $\xi$ . The squares correspond to the AGN spectrum, with $\xi _{{\rm eq}}$ indicated.
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$\begin{figure} \par\includegraphics[width=14.85cm,clip]{Rapport_G.ps}\end{figure}$	Figure 9: G ratio as a function of the column density CD for different values of the ionization parameter $\xi$ , and for the standard continuum. The diamond corresponds to the AGN continuum, for $\xi _{{\rm eq}}=100$ .
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$\begin{figure} \par\includegraphics[height=7cm,width=7.15cm,clip]{R_vs_xi.ps}\end{figure}$	Figure 10: R ratios for OVII and SiXIII as a function of the ionization parameter, for a density of 10⁷ cm^-3, and for the standard continuum. Solid curves: CD=10²³ cm^-2; dashed curves: CD=10¹⁸ cm^-2.
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$\begin{figure} \par\includegraphics[height=5.85cm,width=7.5cm,clip]{Rapport_R.ps}\end{figure}$	Figure 11: R ratios for OVII and FeXXV as a function of the density, for two values of the column density and of the ionization parameter, for the standard continuum.
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$\begin{figure} \par\includegraphics[width=13cm,clip]{Spectre_raie07_n7.ps}\end{figure}$	Figure 12: Spectrum showing the OVII triplet for several values of the column density and of the ionization parameter. The influence of an increasing column density at a given ionization parameter is shown on the left panels, and the influence of an increasing ionization parameter at a given column density is shown on the right panel.
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$\begin{figure} \par\includegraphics[width=13cm,clip]{Spectre_raieSi13_n7.ps}\end{figure}$	Figure 13: Same caption as Fig. 12 but for the SiXIII triplet.
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