\begin{table}%t5
  \caption{\label{tab_PAHs}Line fluxes of the PAHs features at 8.6~$\mu$m and line
    fluxes of the PAHs complex at 11~$\mu$m.}
\par
%\centerline
{
\begin{tabular}{lrcrcc}
  \hline
  \hline\noalign{\smallskip}
  Star         & PAHs 8.6  (W/m$^2$)   & & Comp 11  (W/m$^2$)     & & Ref.   \\
  \hline
  HD~142527  & $<$9.90~$\times$~10$^{-15}$ & & 2.09~$\times$~10$^{-14}$   & & 1  \\
  HD~169142  & 2.55~$\times$~10$^{-14}$    & & 8.18~$\times$~10$^{-15}$   & & 1  \\
  HD~150193A & $<$3.64~$\times$~10$^{-15}$ & & 8.29~$\times$~10$^{-15}$   & & 1  \\
  HD~163296  & $<$5.57~$\times$~10$^{-15}$ & & 1.49~$\times$~10$^{-14}$   & & 1  \\
  HD~100546  & 5.61~$\times$~10$^{-14}$    & & 3.89~$\times$~10$^{-13}$   & & 1\\
  HD~98922   & y                        & & 1.4~$\times$~10$^{-14}$     & & 2, 3 \\
  HD~250550  &  n                       & &       n                  & & 4  \\
  HD~259431  & --                       & &       --                 & & --    \\
  HD~45677   & --                       & &       --                 & & --   \\
  UX~Ori     & $<$1.57~$\times$~10$^{-15}$ & & $<$7.20~$\times$~10$^{-16}$ & & 1   \\
  HD~100453  & $<$1.65~$\times$~10$^{-14}$ & & 7.83~$\times$~10$^{-15}$    & & 1\\   
  HD~101412  & y                        & & 1.5~$\times$~10$^{-15}$     & & 2, 3   \\
  HD~104237  & $<$2.67~$\times$~10$^{-15}$ & & $<$1.56~$\times$~10$^{-15}$ & & 1    \\
  HD~142666  & $<$5.37~$\times$~10$^{-15}$ & & 5.42~$\times$~10$^{-15}$    & & 1 \\
  49~Cet     & --                       & &       --                 & & --    \\ 
  MWC~758    & --                       & &       --                 & & --      \\
  V892~Tau   & --                       & &       --                 & & --   \\
  VV~Ser     & $<$1.67~$\times$~10$^{-15}$ & & 2.04~$\times$~10$^{-15}$   & & 1\\
  HD~97048   & 4.52~$\times$~10$^{-14}$    & & 3.97~$\times$~10$^{-14}$   & & 1\\
  AB~Aur     & 3.68~$\times$~10$^{-14}$    & & 4.61~$\times$~10$^{-14}$   & & 1 \\
  \hline 
\end{tabular}}
\tablefoot{ -- Data not available.
 ``Y'' (yes): presence of PAHs features but flux not measured,
  ``N'' (no): absence of PAHs features.}\vspace{-2mm}
 \tablebib{References: 1: \cite{Acke04b}; 2: \cite{Geers06}; 3:
  \cite{Geers07a}; 4: \cite{Habart04a};} 
\end{table}