\begin{table}%T4
\caption{\label{modelos}Total mass ($M$), hydrogen envelope mass ($M_{\rm H}$),
$T_{\rm eff}$ and $\log g$ of the structural models at the beginning of the 
sdB
time evolution of sequences~A,~B,~C and~D.}
\small%\centering
\par
\begin{tabular}{ccccc}
\hline\hline
& $M (M_{\odot})$ & $M_{\rm H} (M_{\odot})$ & $T_{\rm eff}$ (K) & $\log g$ (dex)\\
\hline\noalign{\smallskip}
A & 0.46 & $2.2\times  10^{-5}$ & 33~806 & 6.07\\
B & 0.47 & $2.5\times  10^{-4}$ & 30~620 & 5.87\\
C & 0.47 & $3.0\times  10^{-4}$ & 28~675 & 5.72\\
D & 0.53 & $2.8\times 10^{-4}$ & 32~395 & 5.80\\
\hline
\end{tabular}
\end{table}