\begin{table}%t3 
\caption{\label{table:SimForSigma15}Same as Table~\ref{table:IsoForSigma15} but for the simultaneous formation of Jupiter and Saturn.} 
\par
%\centering
\par
\begin{tabular}{lllllllll}
\hline \hline \noalign{\smallskip}
MM & & Jupiter& & & & Saturn & & \\ 
SN & & & & & &  & & \\ 
 & $\Sigma_{\rm s}$ & $\rho_{\rm g}$ & $M_{\rm c}$ & $t_{\rm f}$ & $\Sigma_{\rm s}$ & $\rho_{\rm g}$ & $M_{\rm c}$ & $t_{\rm f}$ \\
\hline
                 6 & 15.18 & 3.81 & 30.20 & 1.74 &  6.14 & 0.73 &  0.76 & ${>}10$ \\
  7 & 17.71 & 4.45 & 34.67 & 1.07 &  7.17 & 0.85 &  2.91 & ${>}10$ \\
  8 & 20.24 & 5.08 & 40.95 & 0.61 &  8.19 & 0.97 & 17.48 & 7.08 \\
  9 & 22.77 & 5.72 & 44.48 & 0.33 &  9.22 & 1.09  & 22.26 & 3.02 \\
 10 & 25.30 & 6.35 & 48.83 & 0.16 & 10.24 & 1.21  & 27.41 & 1.56 \\
\hline
\end{tabular} 
\end{table}