All Figures

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig1.eps} }\end{figure}$ Figure 1: Positions of the SW and NE absorption components as observed with PdBI in the HCO⁺ ( $2\leftarrow 1$ ) line. The RA and Dec offsets ( top) at each velocity channels, indicating the position of the absorption (shaded area), were obtained from a fit of the interferometric visibilities. These positions are reported on a Hubble Space Telescope I band image of the z = 0.89 galaxy ( bottom). The HST data were retrieved from the STScI Archive site: " http://archive.stsci.edu/hst/search.php'' and reduced within IRAF. The SW absorption clearly falls right on top of a spiral arm.
Open with DEXTER

In the text

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig2.eps} }\end{figure}$ Figure 2: HCO⁺ absorption lines observed at different epochs from 1999 to 2002. For comparison, all spectra have been smoothed to the same spectral resolution of 1.25 MHz ( $\simeq$ 4 km s^-1).
Open with DEXTER

In the text

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig3.eps} }\end{figure}$ Figure 3: Spectra of the main isotopomers of HCO⁺, HCN and HNC ( from top to bottom respectively). The velocity resolution is 2 km s^-1.
Open with DEXTER

In the text

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig4.eps} } \end{figure}$ Figure 4: Spectra of the different species and isotopomers observed for this survey. From top to bottom: HNC, HCO⁺, HCN, CS and H₂S isotopomers. The velocity resolution is $\simeq$ 2 km s^-1 except for the C³⁴S spectrum, for which it is $\simeq$ 4 km s^-1.
Open with DEXTER

In the text

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig5.eps} }\end{figure}$ Figure 5: Line opacity profiles of the $J=2\leftarrow 1$ HNC ( up), H¹³CO⁺ ( middle) and HC¹⁸O⁺ ( down) for the SW component with the decomposition into Gaussian components.
Open with DEXTER

In the text

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig6.eps} }\end{figure}$ Figure 6: Spectrum observed at the frequency of the DNC ( $2\leftarrow 1$ ) line, smoothed to a resolution of 4.6 km s^-1.
Open with DEXTER

In the text

$\begin{figure} \par {\includegraphics[width=7.8cm,clip]{5187fig7.eps} }%\end{figure}$ Figure 7: Oxygen isotopic ratios ¹⁶O/¹⁷O vs. ¹⁶O/¹⁸O for different sources.
Open with DEXTER

In the text

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig2.eps} }\end{figure}$	Figure 2: HCO⁺ absorption lines observed at different epochs from 1999 to 2002. For comparison, all spectra have been smoothed to the same spectral resolution of 1.25 MHz ( $\simeq$ 4 km s^-1).
Open with DEXTER

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig3.eps} }\end{figure}$	Figure 3: Spectra of the main isotopomers of HCO⁺, HCN and HNC ( from top to bottom respectively). The velocity resolution is 2 km s^-1.
Open with DEXTER

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig4.eps} } \end{figure}$	Figure 4: Spectra of the different species and isotopomers observed for this survey. From top to bottom: HNC, HCO⁺, HCN, CS and H₂S isotopomers. The velocity resolution is $\simeq$ 2 km s^-1 except for the C³⁴S spectrum, for which it is $\simeq$ 4 km s^-1.
Open with DEXTER

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig5.eps} }\end{figure}$	Figure 5: Line opacity profiles of the $J=2\leftarrow 1$ HNC ( up), H¹³CO⁺ ( middle) and HC¹⁸O⁺ ( down) for the SW component with the decomposition into Gaussian components.
Open with DEXTER

$\begin{figure} \par {\includegraphics[width=7cm,clip]{5187fig6.eps} }\end{figure}$	Figure 6: Spectrum observed at the frequency of the DNC ( $2\leftarrow 1$ ) line, smoothed to a resolution of 4.6 km s^-1.
Open with DEXTER

$\begin{figure} \par {\includegraphics[width=7.8cm,clip]{5187fig7.eps} }%\end{figure}$	Figure 7: Oxygen isotopic ratios ¹⁶O/¹⁷O vs. ¹⁶O/¹⁸O for different sources.
Open with DEXTER