\begin{table}%t3
%\centering
\par
\caption{Linear relations between the amplitude of the velocity
curves and the line depth (at minimum extension of the star),
${\Delta RV_c}= a_0  D + b_0 $ are given for all stars, together
with the $1\sigma$ uncertainty. The {\it reduced} $\chi^2$, defined
as $\chi_{{\rm red}}^2=\frac{\chi^2}{N-\nu}$ with $N$ the number of
spectral lines and $\nu$ the number of degrees of freedom is also
indicated. \label{Tab_Results}}
\begin{tabular}{lccc}
\hline \hline \noalign{\smallskip}
\par
Star    &   $a_0$    &   $b_0$    &    $\chi_{{\rm red}}^2$  \\
    \hline
R~TrA   &   2.50 $\pm$ 4.55    &   28.48  $\pm$   0.90    &   2   \\
S~Cru   &   2.13 $\pm$ 3.61    &   33.33  $\pm$   0.90    &   2   \\
Y~Sgr   &   5.76 $\pm$ 3.53    &   34.01  $\pm$   0.12    &   20  \\
$\beta$~Dor &   0.86  $\pm$ 1.31    &   31.59  $\pm$   0.40    &   9   \\
$\zeta$~Gem &   1.09  $\pm$   0.89    &   25.35 $\pm$   0.31    &   7   \\
RZ~Vel  &   8.32   $\pm$   5.95    &   47.31   $\pm$   1.02    &   6   \\
$\ell$~Car  &   2.89    $\pm$   2.26    &   32.48   $\pm$   0.67    &   15  \\
RS~Pup  &   5.89    $\pm$   5.58    &   42.19   $\pm$   0.88    &   4   \\
\hline
\end{tabular}
\end{table}