\begin{table}%t4
%\centering
\par
\caption{Parameters of the ashes for $\rho=\unit[1.0 \times 10^8]{g\ cm^{-3}}$.\label{tab:par3}}
\begin{tabular}{l*{3}{c}}
\hline\hline
                                                                        & N                     & S             & M3    \\
\hline\\[-3mm]
$T$/10$^9$ K                                            &6.725          &6.366  &6.357  \\      
%\hline
$\rho$/10$^7$ g cm$^{-3}$                       &4.456          &5.043  &5.027  \\
%\hline
$\Delta q$/10$^{17}$ erg g$^{-1}$       &7.860          &5.977  &6.007  \\
\hline 
\end{tabular}
\end{table}