All Figures

$\begin{figure} \par\includegraphics[width=9cm,clip]{8906fig1.eps} \end{figure}$ Figure 1: Luminosity ratios of Ly $\alpha$ to H $\alpha$ , Ly $\alpha$ to Ly $\beta$ , and Ly $\beta$ to H $\alpha$ , denoted by $\Gamma _{\rm {Ly}\alpha /\rm {H}\alpha }$ , $\Gamma _{\rm {Ly}\alpha /\rm {Ly}\beta }$ , and $\Gamma _{\rm {Ly}\beta /\rm {H}\alpha }$ , respectively, as a function of the shock velocity, $v_{\rm s}$ .
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In the text

$\begin{figure} \par\includegraphics[width=9cm,clip]{8906fig2.eps}\end{figure}$ Figure 2: Luminosity ratios of Ly $\gamma$ to H $\alpha$ , H $\beta$ to H $\alpha$ , and P $\alpha$ to H $\alpha$ , denoted by $\Gamma _{\rm {Ly}\gamma /\rm {H}\alpha }$ , $\Gamma _{\rm {H}\beta /\rm {H}\alpha }$ , and $\Gamma _{\rm {P}\alpha /\rm {H}\alpha }$ , respectively, as a function of the shock velocity, $v_{\rm s}$ . Only charge transfers to excited states are considered in these ratios, so they should be used with caution; we use only the luminosity ratios for $v_{\rm s} \gtrsim 5000$ km s^-1 (see text).
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In the text

$\begin{figure} \par\includegraphics[width=9cm,clip]{8906fig3.eps} \end{figure}$ Figure 3: Left: Expected Ly $\alpha$ luminosities, $L_{\rm {Ly}\alpha }$ , from the SNR sample as a function of the shock velocity, $v_{\rm s}$ . Right: $L_{\rm {Ly}\alpha }$ plotted versus the age of the SNR.
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{8906fig4.eps} \end{figure}$ Figure 4: Luminosity ratios of the 2 $\gamma$ continuum to H $\alpha$ , $\Gamma _{2\gamma /\rm {H}\alpha }$ . Only charge transfers and excitations to the 2s level are considered (see text).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig5.eps}\end{figure}$ Figure B.1: Cross sections for charge transfers between hydrogen atoms and protons, to the sub-levels 2s and 2p, taken from Belkíc et al. (1992) and Harel et al. (1998). Also shown are the fitting functions of Barnett et al. (1990), denoted by ``B90''.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig6.eps}\end{figure}$ Figure B.2: Cross sections for charge transfers between hydrogen atoms and protons, to the sub-levels 3s, 3p, and 3d, taken from Belkíc et al. (1992) and Harel et al. (1998). Shown for comparison are the calculations of Balança et al. (1998), denoted by ``BLF98''.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig7.eps}\end{figure}$ Figure B.3: Cross sections for charge transfers between hydrogen atoms and protons, to the sub-levels 4s, 4p, 4d, and 4f, taken from Belkíc et al. (1992) and Harel et al. (1998).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig8.eps}\end{figure}$ Figure B.4: Cross sections for impact excitation of hydrogen atoms by protons, from the two-center atomic-orbital (TCAO) close-coupling calculations of Balança et al. (1998). Shown are the fits to the TCAO-A calculations.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig9.eps}\end{figure}$ Figure B.5: Cross sections for impact excitation of hydrogen atoms by electrons, to the sub-levels 2p and 3p, from the NIST Electron-Impact Cross Section Database.
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In the text

$\begin{figure} \par\includegraphics[width=9cm,clip]{8906fig1.eps} \end{figure}$	Figure 1: Luminosity ratios of Ly $\alpha$ to H $\alpha$ , Ly $\alpha$ to Ly $\beta$ , and Ly $\beta$ to H $\alpha$ , denoted by $\Gamma _{\rm {Ly}\alpha /\rm {H}\alpha }$ , $\Gamma _{\rm {Ly}\alpha /\rm {Ly}\beta }$ , and $\Gamma _{\rm {Ly}\beta /\rm {H}\alpha }$ , respectively, as a function of the shock velocity, $v_{\rm s}$ .
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$\begin{figure} \par\includegraphics[width=9cm,clip]{8906fig3.eps} \end{figure}$	Figure 3: Left: Expected Ly $\alpha$ luminosities, $L_{\rm {Ly}\alpha }$ , from the SNR sample as a function of the shock velocity, $v_{\rm s}$ . Right: $L_{\rm {Ly}\alpha }$ plotted versus the age of the SNR.
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{8906fig4.eps} \end{figure}$	Figure 4: Luminosity ratios of the 2 $\gamma$ continuum to H $\alpha$ , $\Gamma _{2\gamma /\rm {H}\alpha }$ . Only charge transfers and excitations to the 2s level are considered (see text).
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$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig5.eps}\end{figure}$	Figure B.1: Cross sections for charge transfers between hydrogen atoms and protons, to the sub-levels 2s and 2p, taken from Belkíc et al. (1992) and Harel et al. (1998). Also shown are the fitting functions of Barnett et al. (1990), denoted by ``B90''.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig6.eps}\end{figure}$	Figure B.2: Cross sections for charge transfers between hydrogen atoms and protons, to the sub-levels 3s, 3p, and 3d, taken from Belkíc et al. (1992) and Harel et al. (1998). Shown for comparison are the calculations of Balança et al. (1998), denoted by ``BLF98''.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig7.eps}\end{figure}$	Figure B.3: Cross sections for charge transfers between hydrogen atoms and protons, to the sub-levels 4s, 4p, 4d, and 4f, taken from Belkíc et al. (1992) and Harel et al. (1998).
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$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig8.eps}\end{figure}$	Figure B.4: Cross sections for impact excitation of hydrogen atoms by protons, from the two-center atomic-orbital (TCAO) close-coupling calculations of Balança et al. (1998). Shown are the fits to the TCAO-A calculations.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{8906fig9.eps}\end{figure}$	Figure B.5: Cross sections for impact excitation of hydrogen atoms by electrons, to the sub-levels 2p and 3p, from the NIST Electron-Impact Cross Section Database.
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