\begin{table}%t3
%\centering
\par
\caption{\label{tabcore}Properties of the narrow cores observed in the
  \ion{Fe}{ii}~5169 lines of five shell stars. The resolving power of
  UVES was $R=80$~000, see Sect.\ \ref{secobs} for H{\sc eros} and
  F{\sc eros}. The stellar radial velocities $v_\star$ were taken from
  the General Catalogue of Radial Velocities
  \citep[ GCRV]{1953GCRV..C......0W} and its revised edition
  \citep{1967IAUS...30...57E}, respectively. All numbers are given in
  km~s$^{-1}$.  }
\begin{tabular}{llrrrr}\hline\hline
Star & instr.& resolut. & {\it FWHM}$_{\rm shell}$ & $v_{\rm shell}$ 
& $v_\star$\\
%     &            &[km~s$^{-1}$]&[km~s$^{-1}$]&[km~s$^{-1}$]
%&[km~s$^{-1}$] \\
\hline 
EW~Lac         & H{\sc eros} & 15   & 20  &  $-$15   &  $-$11\\
$\psi$~Per     & H{\sc eros} & 15   & 17  &  0   &  $-$1\\
$o$~Aqr        & F{\sc eros} & 6.3  & 9.1 &  9.0 &  12\\
$\omega$~Car    & F{\sc eros} & 6.3  & 9.6 &  0.7 &   7\\
$\beta$ Mon A   & UVES        & 3.8  & 8.4 & 18.6 &  20\\
\hline
\end{tabular}
\end{table}