All Figures

$\begin{figure} \par\includegraphics[width=4.5cm,angle=-90,clip]{5301fig1.eps} \end{figure}$ Figure 1: Three- $\sigma$ detection limits in terms of O VI column density for HE1104-1805 and RX J0911.4+0551.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig2.eps} \end{figure}$ Figure 2: Class III O VI systems toward HE1104-1805 and RX J0911.4+0551 (see Table 2). The thick black line corresponds to the A spectra; the thin blue one to the B spectra.
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In the text

$\begin{figure} \par\includegraphics[width=7.7cm,clip]{5301fig3.eps} \end{figure}$ Figure 3: Class II system in HE1104-1805. Lefthand (righthand) panels show transitions observed along sightline A (B). The smoothed lines show Voigt profiles with line parameters listed in Table 3. In both panels the vertical dashed line indicates z=2.010473, which is the redshift of O VI in the A spectrum.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig4.eps} \end{figure}$ Figure 4: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.052440, which is the redshift of O VI in the B spectrum. Arrows mark a possible C IV system in the A spectrum.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig5.eps} \end{figure}$ Figure 5: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.086682.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig6.eps} \end{figure}$ Figure 6: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.158112.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig7.eps} \end{figure}$ Figure 7: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.200800 and z=2.201069.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig8.eps} \end{figure}$ Figure 8: Class I system in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.437271.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig9.eps} \end{figure}$ Figure 9: Class I system in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.516735 and z=2.517045.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig10.eps} \end{figure}$ Figure 10: Class II systems in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.623886 and z=2.626749.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig11.eps} \end{figure}$ Figure 11: Class I system in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.631480, z=2.631768, z=2.632020, z=2.632495, z=2.632770, z=2.633161, z=2.633486, z=2.633766, and z=2.634119.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig12.eps} \end{figure}$ Figure 12: Comparison of column densities between the A and B lines of sight (upper panel), and fractional change between A and B, $\vert N_{\rm A}-N_{\rm B}\vert/\max(N_{\rm A},N_{\rm B})$ for O VI and C IV in O VI systems. For clarity, the two upper limits on $N(O {\sc vi})_{\rm B}$ have not been displayed. The associated systems have not been included.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig13.eps} \end{figure}$ Figure 13: Same as in Fig. 12 but for simulated data. Column densities were recovered automatically from a sample of synthetic O VI and C IV lines with random redshifts and column densities and same S/N and blending levels as in the real data (see text for more details). The simulated column densities are identical in the two lines of sight.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig14.eps} \end{figure}$ Figure 14: Same as in Fig. 13 but the simulated column densities differ by 0.5 dex (fractional change of $\sim$ 0.7), with the higher column density present in either LOS A or B.
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In the text

$\begin{figure} \par\includegraphics[width=9cm,clip]{5301fig15.eps} \end{figure}$ Figure 15: Velocity shear $\Delta v$ between LOS A and LOS B (filled circles for O VI and open triangles for C IV) and between C IV and O VI along LOS A or LOS B (asterisks) as a function of proper LOS separation, S. Errors in $\Delta v$ are at most $\sim$ 3-5 km s^-1 (from line fitting). The associated systems have not been included.
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{5301fig16.eps} \end{figure}$ Figure 16: Single-phase model for O VI system at z=2.517032 . Curves are theoretical estimates of column densities as a function of cloud radial dimension S_r for each of the relevant species (labeled on top or below the curves). The model assumes a metallicity [M/H] =-2.20 and solar relative abundances. The Si IV curve lies below the y-axis range. Observed values and their errors all are displayed at the x-axis position that matches C III and C IV.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig17.eps} \end{figure}$ Figure A.1: Associated system in HE1104-1805 at z=2.300. Panels and symbols as for Fig. 3, but for z=2.298472, z=2.298920, z=2.299304, z=2.300127, and z=2.300711.

In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig18.eps} \end{figure}$ Figure A.2: Associated system in HE1104-1805 at z=2.314. Panels and symbols as for Fig. 3, but for z=2.314201.

In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig19.eps} \end{figure}$ Figure A.3: Associated system in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.776014, z=2.776399, and z=2.776677.

In the text

$\begin{figure} \par\includegraphics[width=4.5cm,angle=-90,clip]{5301fig1.eps} \end{figure}$	Figure 1: Three- $\sigma$ detection limits in terms of O VI column density for HE1104-1805 and RX J0911.4+0551.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig2.eps} \end{figure}$	Figure 2: Class III O VI systems toward HE1104-1805 and RX J0911.4+0551 (see Table 2). The thick black line corresponds to the A spectra; the thin blue one to the B spectra.
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$\begin{figure} \par\includegraphics[width=7.7cm,clip]{5301fig3.eps} \end{figure}$	Figure 3: Class II system in HE1104-1805. Lefthand (righthand) panels show transitions observed along sightline A (B). The smoothed lines show Voigt profiles with line parameters listed in Table 3. In both panels the vertical dashed line indicates z=2.010473, which is the redshift of O VI in the A spectrum.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig4.eps} \end{figure}$	Figure 4: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.052440, which is the redshift of O VI in the B spectrum. Arrows mark a possible C IV system in the A spectrum.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig5.eps} \end{figure}$	Figure 5: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.086682.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig6.eps} \end{figure}$	Figure 6: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.158112.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig7.eps} \end{figure}$	Figure 7: Class II system in HE1104-1805. Panels and symbols as for Fig. 3, but for z=2.200800 and z=2.201069.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig8.eps} \end{figure}$	Figure 8: Class I system in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.437271.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig9.eps} \end{figure}$	Figure 9: Class I system in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.516735 and z=2.517045.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{5301fig10.eps} \end{figure}$	Figure 10: Class II systems in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.623886 and z=2.626749.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig11.eps} \end{figure}$	Figure 11: Class I system in RX J0911.4+0551. Panels and symbols as for Fig. 3, but for z=2.631480, z=2.631768, z=2.632020, z=2.632495, z=2.632770, z=2.633161, z=2.633486, z=2.633766, and z=2.634119.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig12.eps} \end{figure}$	Figure 12: Comparison of column densities between the A and B lines of sight (upper panel), and fractional change between A and B, $\vert N_{\rm A}-N_{\rm B}\vert/\max(N_{\rm A},N_{\rm B})$ for O VI and C IV in O VI systems. For clarity, the two upper limits on $N(O {\sc vi})_{\rm B}$ have not been displayed. The associated systems have not been included.
Open with DEXTER

$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig13.eps} \end{figure}$	Figure 13: Same as in Fig. 12 but for simulated data. Column densities were recovered automatically from a sample of synthetic O VI and C IV lines with random redshifts and column densities and same S/N and blending levels as in the real data (see text for more details). The simulated column densities are identical in the two lines of sight.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{5301fig14.eps} \end{figure}$	Figure 14: Same as in Fig. 13 but the simulated column densities differ by 0.5 dex (fractional change of $\sim$ 0.7), with the higher column density present in either LOS A or B.
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$\begin{figure} \par\includegraphics[width=9cm,clip]{5301fig15.eps} \end{figure}$	Figure 15: Velocity shear $\Delta v$ between LOS A and LOS B (filled circles for O VI and open triangles for C IV) and between C IV and O VI along LOS A or LOS B (asterisks) as a function of proper LOS separation, S. Errors in $\Delta v$ are at most $\sim$ 3-5 km s^-1 (from line fitting). The associated systems have not been included.
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