\begin{table}%t8
\caption {\label{table:pminpmax}Maximum ($P_{\rm max}$) minimum ($P_{\rm min}$) periods in days 
derived from the synthetic Cepheid distributions.}       
%\centering
\par
\begin{tabular}{l l l }       
\hline\hline
Case & $P_{\rm min}$ (days)  & $P_{\rm max}$ (days)  \\  
\hline  
I  ($std$)       & 2.5  & 72.9 \\
II ($Z_{\rm low}$)      & 1.4 & 87.6  \\
III ($Z_{\rm high}$)      & 2.1 & 21.9 \\ 
IV ($Y_{\rm high}$)       & 2.6 & 92.0  \\ 
\hline                        
\end{tabular}
\end{table}