\begin{table}%t1
%\centering
\par
\caption{\label{multiphase_parameters}Multiphase model parameters.}
    \small
    \begin{tabular}{c c c c}
    \hline
    \hline
    $\beta$   & $(L/M)$                            & $U_{\rm{ext}}$             & $\tau$  \\
              & [erg/s/$M_\odot$]   & $[10^{11}~M_\odot]$  & $[\rm{Gyr}]$ \\
    \hline
     $1$        & $1.58\times 10^{32}$              & $1.8\times 10^{14}$         & 10\\  
    \hline
    \end{tabular} 
\end{table}