\begin{table}%t2
%\centering
\par
\caption{\label{RT_parameters}The total ionizing luminosity of a star particle and escape fraction of simulations.}
   \begin{tabular}{l c c }
\hline
\hline
    Simulations   	& $L_{\rm tot}~\rm [erg/s]$			& $f_{\rm esc}$ 	\\
\hline
    S20			& $4.60\times 10^{43}$			& $0.08$	\\
    S100		& $5.75\times 10^{45}$			& $0.05$	 \\
\hline
\end{tabular}
\end{table}