\begin{table}%ta.1
\caption{\label{table:test_case-B}Test case B of \citet{jouetal08}$^{\rm a}$.}
%\centerline
 {\small \begin{tabular}{ccc}
\hline\hline\noalign{\smallskip}
Resolution & $C_{\alpha}^{{\rm crit}}$ & $\omega$\\
\hline
$8\times8$ & 0.443 & 180.5\\
$10\times10$ & 0.4175 & 175.1\\
$12\times12$ & 0.4095 & 172.2\\
$13\times13$ & 0.411 & 172.4\\
$14\times14$ & 0.4122 & 172.7\\
$16\times16$ & 0.4125 & 172.9\\
\hline
\end{tabular}}
\medskip
$^{\rm a}$ Critical values of the dynamo number, $C_{\alpha}^{\rm crit}$, and the oscillation frequency at the dynamo onset, $\omega$, for different radial and latitudinal spectral resolutions. $\omega$ is measured in units of the inverse magnetic diffusion time.
\end{table}