\begin{table}%t1
%\centering
\par
  \caption{\label{param}Astrophysical parameters of the sample stars.}
\begin{tabular}{lcccccccccccccccccc}
  \hline
  \hline\noalign{\smallskip}
  Star        & Sp.    & $T_{\rm eff}$     & \Av         &  \vrad \tablefootmark{(a)}  & $d$        & Disk         & Evidence for  \\
              & Type   & (K)          & (mag)        & (\kms)       & (pc)       & resolved     &  gas-rich \\
              &         &              &              &              &            &              &  environment \\
  \hline
  HD~142527   & F6~IIIe & 6300$^{(1)}$  & 1.49$^{(1)}$ & $-3.5^{(2)}$  & 140$^{(3)}$ & yes$^{(4)}$   &   \\
  HD~169142   & A8~Ve   & 8130$^{(5)}$  & 0.37$^{(6)}$ & --3.0$^{(7)}$  & 145$^{(5)}$ & yes$^{(8)}$   & yes$^{(9)}$   \\
  HD~150193A  & A1~Ve   & 9300$^{(1)}$  & 1.61$^{(1)}$ & --6.0$^{(10)}$  & 150$^{(1)}$ & yes$^{(11)}$  &    \\
  HD~163296   & A1~Ve   & 9300$^{(1)}$  & 0.25$^{(1)}$ & --4.0$^{(2)}$  & 122$^{(1)}$ & yes$^{(12)}$  & yes$^{(13)}$    \\
  HD~100546   & B9~Vne  & 10470$^{(1)}$ & 0.25$^{(1)}$ & $+17^{(13)}$   & 103$^{(1)}$ & yes$^{(14)}$ & yes$^{(13)}$    \\
  \hline
\end{tabular}
\par
\tablefoot{\tablefoottext{a}{radial velocity of the star in the heliocentric rest  frame.}}
\vspace{-4mm}
\tablebib{$^{(1)}$ \cite{VdA98b}; $^{(2)}$ SIMBAD database;
  $^{(3)}$ \cite{DeZeeuw_99}; $^{(4)}$ \cite{Fukagawa06}; $^{(5)}$
  \cite{Acke05}; $^{(6)}$~ \cite{Malfait98}; $^{(7)}$ \cite{Dunkin97};
  $^{(8)} $\cite{Kuhn01}; $^{(9)}$ \cite{Panic08}; $^{(10)}$
  \cite{Reipurth96}; $^{(11)}$ \cite{Fukagawa03}; $^{(12)}$
  \cite{GRADY00}; $^{(13)}$ \cite{LECAV03}; $^{(14)}$ \cite{Augereau01}.}\vspace{2mm}
\end{table}