\begin{table}%t4
%\centering
\par
\caption{Median $v\sin i$ (in \kms ) for the different age groups. Giants  
were not included in group Hya+.
\label{vrotmed}} 
\begin{tabular}{lllll} 
\noalign{\smallskip}     
\hline 
\hline 
\noalign{\smallskip}    
age group   & PMS &  Pl\_ZAMS & UMa & Hya+ \\
\noalign{\smallskip}    
\hline 
\noalign{\smallskip}    
${\langle v\sin i \rangle}_{\rm med}$   &  32  &  17 & 18 & 11\\ 
\hline 
\end{tabular}
\end{table}