\begin{table}%t1
\caption{Parameters of Herbig Ae/Be candidates. Evidence for a flared disk and disk outer radius from spectral energy
distribution modeling and millimeter interferometry observations. Presence of AIBs
and silicate bands. Crystalline signatures.\label{tab_obs_1}}
%\centerline
{\begin{tabular}{lllllllllllll}
\hline
\hline
Object& $d$ & Sp. type & $T_{\rm eff}$ & \Lstar & $\chi$$^a$ & Flared& $R_{\rm disk}$$^b$ & AIBs & Sil. & Cryst. & Ref. \\  
       & [pc] &  & [K]  & \Lsun  &    & disk & [AU] & & & & \\  
\hline
AB Aur & 144 & B9/A0Ve &  9750 & 47& 10$^5$ & $\surd$ & 140 & $\surd$ & $\surd$  & -- & (1)\\
HD~100~546& 103 & B9Ve & 11~000 & 36& 10$^5$& $\surd$ & 300(150$^{b_1}$) & $\surd$ & $\surd$  &  $\surd$ & (1) \\
HD 142~527 & 200 & F7IIIe & 6250 &31& $4 \times  10^3$ & $\surd$ &          & $\surd$ & $\surd$  &$\surd$$^c$  & (1)  \\
HD 179218 & 240 & B9e & 10~000 &80 & $2 \times  10^5$ & $\surd$ & ($<$600$^{b_2}$) & $\surd$ & $\surd$  &  $\surd$$^c$ & (1)  \\
HD 100453& 114 & A9Ve & 7500 & 9&  $5 \times  10^3$  & $\surd$ &  & $\surd$ & --  & -- & (1)  \\
HD 135344& 84 & F4Ve & 6750 & 3& $6 \times  10^2$    & $\surd$ &  & ? & --  &  -- & (1)  \\
HD 139614& 157 & A7Ve & 8000 & 12& 10$^4$   & $\surd$ &  & -- & --  &  --& (1)  \\
HD 169142 & 145 & A5Ve & 10~500 & 32 &10$^5$& $\surd$ & 220 & $\surd$ & --  & --& (1)  \\
HD 104237 & 116 & A4Ve & 10~500 & 40 & 10$^5$& No &  & -- & $\surd$ & ? & (1)  \\
HD 142666 & 116 & A8Ve & 8500 & 11 &10$^4$ &  No &   & $\surd$ & $\surd$ & $\surd$$^c$ & (1)\\
HD 144432 & 200 & A9Ve & 8000 & 32 & $3 \times 10^4$&  No &   & -- & $\surd$ & ? & (1)  \\
HD 150193 & 150 & A1Ve & 10~000 & 40 & 10$^5$ & No &   & -- & $\surd$ & $\surd$ & (1)   \\
HD 163296  & 122 & A3Ve & 10~500 & 30 & 10$^5$& No &  360 & -- & $\surd$  & $\surd$& (1) \\
\hline
HD 97048 &180  &B9-A0  &  10~000    & 31 & 10$^5$ & & (300$^{b_1}$--900$^{b_2}$)   & $\surd$ &  -- & -- &  (2) \\
Elias 1 & 150 & A0-A6 & 8000 & 21 & $2  \times 10^4$ &  & 70 ($<$200$^{b_3}$) & $\surd$  & $\surd$ & ?$^d$  & (2) \\
\hline
Lk H$\alpha$ 25 &800  &A0 & 9800    & 9 & $2 \times  10^4$&  & ($<$1200)   & $\surd$ &  &  & (3)   \\ 
HK Ori &460           &A5  & 8300    &12  & 10$^4$&  & (70)   & $\surd$ & --  & & (3)    \\ 
HD 245185 &400  &A2  & 9100    & 17 & $3 \times 10^4$& &  (110)   & $\surd$ &  & & (3)    \\ 
Lk H$\alpha$ 198&600  & A5  & 8300    & 6 & $6 \times 10^3$& &  (900)   & -- &$\surd$  &  & (3)   \\ 
BD+61$^{\circ}$154&650  &B8  &  11~200   & 330 & 10$^6$& & (900)   & -- &  & & (3)    \\ 
T Ori &460  &B9  &  10~700   &  83& $3 \times 10^5$ & &  (88)   & -- &  -- &  & (3)   \\ 
V380 Ori &460  &B9  & 10~700     &85  & $3\times  10^5$& & (150)   &-- & $\surd$  & & (3)    \\ 
HD 250550 &700  &B7  &  12~300   &240  & 10$^6$ & & (410)   & -- & --  &  & (3)   \\ 
Lk H$\alpha$ 208&1000  &B7  & 12~300    &210  &10$^6$ & & (1600)   & -- &  &  & (3)   \\ 
VV Ser &440  &B9  &  10~700   &100  & $4 \times  10^5$& & (410)   & -- & --  & & (3)    \\ 
WW Vul &700  &A3  &  8700   &20  & $3\times  10^4$ & & (88)   & -- &  &  & (3)   \\ 
BD+46$^{\circ}$3471 &1000  &A0  &9800     &508  & 10$^6$& &  (190)   & -- &  & & (3)    \\
Lk H$\alpha$ 233 &880  &A5  &   8300  & 30 & $3 \times 10^4$& & (320)   & -- &  $\surd$ &  & (3)   \\
\hline
WL 16 & 125 & B8-A7 & 9000 & 240 & $4 \times  10^5$ &  & (450) &$\surd$ & -- & -- & (4)\\\hline
\end{tabular}}
\par
 \smallskip
{\small $\surd$ : detection, ?: possible detection, --: no detection. \\
$^a$ Far-ultraviolet (FUV, 6 $<h\nu<$ 13.6 eV) flux at 150 AU from the star expressed in units of the average interstellar radiation field, $1.6\times 10^{-6}$~W~m$^{-2}$ \cite[]{habing68}. \\
$^b$ In parenthese we give estimate of the PAH emission extension. References: 
(b1) \cite{boekel03}; (b2) \cite{siebenmorgen2000}; (b3) \cite{brooke93}. \\
$^c$ Possible blend with the PAH 11.2(3)~$\mu$m band. \\
$^d$ \cite{hanner94}.\\
References: (1) \cite{meeus2001} and references therein;
(2) \cite{vankerckhoven2002} and references therein; 
(3) for astrophysical parameters \cite{hillenbrand92} (except for BD+46$^{\circ}$3471 see \cite{berrilli92}
and for VV Ser see \cite{testi98}); for PAH~emission extension and AIBs detection \cite{brooke93};
for silicate emission features detection \cite{berrilli92};
(4) \cite{ressler2003} and references therein. }
\end{table}