\begin{table}%t1
\caption{\label{table1}Dead-zone parameters for the different models considered.}
\par
%\centering
\par
\begin{tabular}{c c c}
\hline \hline \noalign{\smallskip}
$H_{\rm DZ}/H$ & $\alpha_{\rm AZ}$ & $\alpha_{\rm DZ}$ \\
\hline\noalign{\smallskip}
$0.5$ & $2.3\times 10^{-3}$ & $1\times 10^{-7}$ \\
$1$   & $4.4 \times 10^{-3}$ & $1\times 10^{-7}$ \\
$1.5$ & $1.05 \times 10^{-2}$ & $1\times 10^{-7}$ \\
$2.3$ & $6.5 \times 10^{-2}$ & $1\times 10^{-7}$\\
\hline
\end{tabular}
\end{table}