\begin{table}%t1
\par
%\centering
\caption{A comparison between numerical polar eigenfrequencies (Num.),
   adiabatic ones ($\omega^0_n$) and a WKB approximation.  The numerical
   values were obtained using a least square method on the eigenvalues
   corresponding to $E=\Em=10^{-4}$ and correspond to the intersection between
   the eigenbranches and the imaginary axis.}
   \label{table:polar.eigenspectrum}
      \begin{tabular}{cccc}
         \hline\hline
         $n$                   &
         \mbox{Num.}         &  
         $\omega^0_n $         & 
         \mbox{WKB}         \\
         \hline
         0 &  3.8167 &  3.8171 &  6.3789 \\
         1 & 17.6147 & 17.5996 & 19.1367 \\
         2 & 30.6762 & 30.6363 & 31.8945 \\
         3 & 43.6358 & 43.5575 & 44.6524 \\
         4 & 56.5614 & 56.4305 & 57.4102 \\
         5 & 69.4727 & 69.2767 & 70.1680 \\
         6 & 82.3822 & 82.1057 & 82.9258 \\
         7 & 95.2896 & 94.9228 & 95.6836 \\
         \hline
      \end{tabular} 
   \end{table}