\begin{table}%t1
\caption{\label{t1}Grid of models.}
%%\centering

\par
\begin{tabular}{l c c c c c c}
\hline\hline\noalign{\smallskip}
Models $\to$ & M1 & M2 & M3 & M4 & M5 & M6 \\
\hline
$\tau$ [yr] & \phantom{0}50 & \phantom{0}50 & 100 & 100 & 200 & 200 \\
$\Delta v$ [km s$^{-1}$] & \phantom{0}60 & \phantom{0}30 &
\phantom{0}60 & \phantom{0}30 & \phantom{0}60 & \phantom{0}30 \\
\hline
\end{tabular}
\end{table}