\begin{table}%t1
\caption{Parameters of the Gaussians fitting the $U$~distribution of
  stars from Famaey et~al. (\cite{Fama05}), in the $V$-strip
  corresponding to the Pleiades, $-28 \le V$~(\kms)~$\le$ $-18$. The parameters~$k_i$ give the relative fractions $N_i/N_{\rm tot}$, where $N_i$ is the total number of stars in 
  component~$i$, and $N_{\rm tot}=1176$ is the total number of stars in the
  $V$-strip. The fraction~$f_{s}$ is the
  relative fraction of stars from the Pleiades moving group with respect to
  {\it all} stars in the restricted $\pm$$1.4 \sigma_{U}$ range
  around the Gaussian average, corresponding to the Pleiades zone where the wavelet coefficients are nonzero at scale~4 (see Sect.~3).}
\label{Tab:gaussian_ple}
%\centering
\small
\begin{tabular}{llllllll}
\hline \hline
                  & background & Pleiades\\
\hline
&& \\[-8pt]
$\bar{U}$ (\kms)  & $-2$ & $-16$ \\
$\sigma_U$ (\kms) & 33   & 5     \\
$k$               & 0.8  & 0.12  \\
$f_{s}$           &    & 0.46  \\ 
\hline
\end{tabular}
\end{table}