\begin{table}
\caption{ \label{tableau} Observable characteristics of the stars and best model
  reproducing them. The subscripts "$_{\rm ini}$'' and "$_{\rm surf}$'' respectively
  refer to initial values and current surface quantities. 
  Note that the presented errors of VLTI/VINCI angular diameters are the statistical 
  ones followed by the systematical ones.
  Note also that $D/D_\odot $ is equal to $R/R_\odot $.
  }
  %\centering
\par
\begin{tabular}{lllllll} 
%\hline\hline
\hline\hline\\[-2mm]
%\tabularnewline[0.3\baselineskip]
\par
%%%    &   $\delta$ Eri        & & $\xi$ Hya           & & $\eta$ Boo          &  \\
    & \object{$\delta$ Eri} & & \object{$\xi$ Hya}  & & \object{$\eta$ Boo} &  \\[2mm]
  $  V           $     &   $  3.51 \pm 0.02  $ & & $  3.54 \pm 0.01  $ & & $  2.68 \pm 0.01  $ & \\ 
  $ \rm BC          $     &   $ -0.24 \pm 0.01  $ & & $ -0.26 \pm 0.01  $ & & $ -0.06 \pm 0.01  $ & \\
  $ T_{\rm eff} \rm (K) $     &   $  5074 \pm 60    $ & & $  5010 \pm 100   $ & & $  6050 \pm 150   $ & \\
  $ L/L_\odot   $     &   $  3.19 \pm 0.06  $ & & $  60.7 \pm 4.1   $ & & $  8.95 \pm 0.20  $ & \\
  $\rm  [Fe/H]_{surf} $   &   $  0.13 \pm 0.08  $ & & $ -0.04 \pm 0.12  $ & & $  0.24 \pm 0.07  $ & \\
  $ \log g    $       &   $  3.77 \pm 0.16  $ & & $  2.93 \pm 0.30  $ & & $  3.66 \pm 0.20  $ & \\
  $\rm \theta_{LD}(mas) $ &   $ 2.394 \pm 0.014 $ & & $ 2.386 \pm 0.009 $ & & $ 2.200 \pm 0.027 $ & \\
                          & \saut $   \pm 0.025 $ & & \saut $ \pm 0.019 $ & & \saut $ \pm 0.016 $ & \\
  $D/D_\odot  $       &   $ 2.33 \pm 0.03   $ & & $  10.3 \pm 0.3   $ & & $  2.68 \pm 0.05 $ & \\
  $\rm \pi (mas) $        &   $ 110.58 \pm 0.88 $ & & $ 25.23 \pm 0.83  $ & & $ 88.17 \pm 0.75  $ & \\
  $\rm  \Delta \nu_0 
       (\mu Hz)$          &   $ 43.8 \pm 0.3    $ & & $ 7.1             $ & & $ 40.47 \pm 0.05  $ 
%\\
 \\[2mm]
\par
%\tabularnewline[0.3\baselineskip]
%\hline  
\hline\\[-1mm]                                                                                  
%\tabularnewline[0.3\baselineskip]
  & $\delta$ Eri    & $\delta$ Eri &               $\xi$ Hya    & $\xi$ Hya &           $\eta$ Boo & $\eta$ Boo \\
  &    diffusion   & no diffusion  &  diffusion & no diffusion   & diffusion &   no diffusion\\
\tabularnewline[0.2\baselineskip]
 $  M / M_\odot $    & 1.215  &  1.215   &   2.65   & 2.65     &    1.70   &      1.70     \\
  Age of
  the ZAMS 
  (Myr)                  & 20.14  &  20.06   &  2.724   &  2.719   &    12.68  &      12.67    \\
Age (from
 ZAMS) (Myr)             & 6194.  &  6196.   &  509.52  &  505.34  &    2738.5 &      2355.    \\
 $ Y_{\rm ini} $         & 0.28   &  0.28    &  0.275   &  0.275   &    0.260  &      0.260    \\
 $[Z/X]_{\rm  ini} $     & 0.148  &  0.148   &  0.00    &  0.00   &    0.367  &      0.367    \\
 $ T_{\rm eff} \rm (K) $     & 5055.  &  5066.   &  5037.   &  5034.   &    6050.  &      6090.    \\
 $L/L_\odot  $      & 3.176  &  3.230   &  61.23   &  61.0    &    8.944  &      8.978    \\
 $  R/R_\odot  $     & 2.328  &  2.337   &  10.30   &  10.30   &    2.728  &      2.697    \\
 $ \log g   $        & 3.788  &  3.785   &  2.835   &  2.832   &    3.796  &      3.806    \\
 $ Y_{\rm surf}  $       & 0.266  &  0.28    &  0.274   &  0.275   &    0.228  &      0.260    \\
 $ [Z/X]_{\rm surf}$     & 0.123  &  0.148   &  0.00    &  0.00    &    0.303  &      0.367    \\
 $M_{\rm CZ} (M_{\star})$& 0.729  &  0.727   &  0.608   &  0.596   &    0.9994 &      0.9994   \\ 
 $R_{\rm CZ} (R_{\star})$& 0.475  &  0.475   &  0.422   &  0.417   &    0.8388 &      0.8505   \\ 
  $\rm  \Delta 
  \nu_0 (\mu Hz)$     & 45.27  &  44.91   &  7.23    &  7.28    &      41.91  &      42.47 \\
\tabularnewline[0.3\baselineskip]
\hline
\end{tabular}
\end{table}