\begin{table}%t2
%\centering
\par
\caption{Stratification parameters and optimal conditions for the onset of instability. $A^*_{\rm max}$ is the highest value of $A^*=\varepsilon A_t+A_\mu$ that allows for instability; $[AS]_{\rm max}$ the maximum of the product $A^*S(A^*)$ for fixed $\varepsilon A_t/A_\mu$, obtained at $A^*_{\rm opt}$, from which one derives the instability threshold for the magnetic field (see text).\label{table1}}
\begin{tabular}{c c c c c}
\hline\hline
$\varepsilon A_t  / A_\mu$ &  $A^*_{\rm max}$ & $S(A^*_{\rm max})$ &$[AS]_{\rm max}$ & $A^*_{\rm opt}$ \\
\hline
0 & 12.928& 0 &9.829 & 8.788 \\
0.01 &10.249 & 0.602 &9.307 & 8.138 \\
0.1 & 6.970 & 0 .754 &6.960 & 5.885 \\
1 & 4.000 &0.550& 3.451 & 3.171 \\
10 & 3.125 & 0.219 & 2.186 & 2.087 \\
$\infty$ & 3& 0 & 0.728 & 2.070 \\
\hline
\end{tabular}
\end{table}