\begin{table}%t4
%\centering
\par
\caption{Concentration and perturbation asymptotic growth factor in
  the different cosmologies.\label{cd}}
\begin{tabular}{llll}
\hline\hline 
\noalign{\smallskip}
cosmology & $\displaystyle\frac{c_0}
             {c_0^{\rm \Lambda CDM}}$ &
            $\displaystyle\frac{D_+(\infty)}
             {D_+^{\rm \Lambda CDM}(\infty)}$ &
            $\displaystyle\frac{D_+(z_{\rm coll})}
             {D_+^{\rm \Lambda CDM}(z_{\rm coll})}$ \\
\noalign{\smallskip}
\hline
${\rm \Lambda CDM}$ & 1 & 1 & 1 \\
RP    & $1.06\pm0.011$ & 1.07 & $1.07\pm0.0003$ \\
SUGRA & $1.16\pm0.013$ & 1.22 & $1.19\pm0.004$  \\
DECDM & $1.18\pm0.013$ & 1.19 & $1.18\pm0.001$  \\
OCDM  & $1.49\pm0.018$ & 1.64 & $1.61\pm0.01$   \\
\hline
\end{tabular}
\end{table}