\begin{table}%T1
      \caption{Stellar properties of the selected sample of Lindroos PTTSs.}\label{table1}
%\centerline
{
\begin{tabular}{llllrclll}
          \noalign{\smallskip}
          \hline\hline
          \noalign{\smallskip}
HD  & Sp. type$^1$ & Distance$^2$ & Sep.$^3$ & $V^4$ & $A_{\rm v}$$^5$ & 
$\log~L_{\rm X}$$^6$ & Mass$^7$ & Age$^8$ \\
%\cline{3-5}%\cline{5-6}
&   &  (pc)       & (AU) & (mag) & (mag) & (erg/s) & ($M_{\rm \odot}$) & Myr\\
          \noalign{\smallskip} 
          \hline 
          \noalign{\smallskip}
560~B    & G5 + B9  & 100 $\pm$ 9  & 770  & 10.37 & 0.00 & 30.56    & 0.95 & 20/30/36/30\\
17543~B  & F8 + B6  & 187 $\pm$ 37 & 4625 & 10.73 & 0.21 & 30.17    & 1.18 & 24/28/-/25\\
23793~B  & F3 + B3  & 173 $\pm$ 31 & 1557 & 9.41  & 0.08 & 30.25   & --    & $<$28$^*$\\
27638~B  & G2 + B9  &  82 $\pm$ 8  & 1558 & 8.43  & 0.00 &$<$28.49 &1.25  & 12/15/19/15\\
33802~B  & G8 + B8  &  74 $\pm$ 4  & 940  & 9.92  & 0.01 & 30.03   & 0.90 & 25/50/47/37 \\ 
38622~C  & G2 + B2  & 245 $\pm$ 54 & 6125 & 12.01 & 0.04 & 29.99   & 1.05 & 30/100/-/110\\ 
40494~B  & G8 + B3  & 263 $\pm$ 38 & 8889 & 12.66 & 0.00 &$<$28.57 & 0.94 & 35/100/-/76 \\ 
53191~B  & G3 + A0  & 207 $\pm$ 25 & 3519 & 11.75 & 0.05 & 29.53   & 1.00 &  30/80/-/39\\ 
60102~B  & G8 + B9.5& 206 $\pm$ 25 & 3378 & 11.86 & 0.22 & 30.62   & 1.00 &  15/25/-/20\\ 
86388~B  & F5 + B9  & 177 $\pm$ 21 & 1628 & 9.98  & 0.02 & 29.42   & 1.28 &  -/30/-/110\\ 
90972~B  & F9 + B9.5& 147 $\pm$ 16 & 1617 & 9.65  & 0.03 & 30.11   & 1.25 &  14/18/18/15\\ 
108767~B & K2 + B9  &  27 $\pm$ 9  & 648  & 8.43  &  0.00& 28.95   & 0.8  &  40/90/-/93 \\ 
109573~B$^+$ & M2.5 + A0 & 67 $\pm$ 3& 509& 13.3  & 0.00 & 29.75   & 0.3  & 10 \\ 
113703~B & K0 + B4  & 127 $\pm$ 12 & 1448 & 10.8  & 0.00 & 30.22   & 0.98 & 15/25/19/23 \\
113791~B & F7 + B2  & 126 $\pm$ 13 & 3163 & 9.38  & 0.00   & 29.98   & 1.22 & 18/22/11/21 \\
127304~B & K1 + A0  & 106 $\pm$ 8  & 2734&  11.37 & 0.04 & $<$28.73& 0.84 &50/100/-/100 \\
129791~B & K5 + B9.5& 129 $\pm$ 16 & 4554 & 12.93 & 0.26 & 29.82   & --    & 39$^*$ \\
143939~B & K3 + B9  & 167 $\pm$ 27 & 1436 & 11.80 & 0.00 & 30.52   & 1.15 & 2.5/7/8.3/6 \\
        \noalign{\smallskip}
        \hline \\
        \end{tabular}}
\par
        \medskip
{\bf Notes:} 1. Adopted from Pallavicini et~al. (\cite{Pallavicini92}). The spectral
type of the early-type primary star is also provided; 2. deduced from
Hipparcos parallax of the primary star; 3. separation between the
stars of the Lindroos binary system using Hipparcos parallax;
4. adopted from Pallavicini et~al. (\cite{Pallavicini92}); 5. adopted from L86; 6.
adopted from Hu\'elamo et~al. (\cite{Hu00}); 7.  masses estimated adopted
from Gerbaldi et~al. (\cite{Gerbaldi01}) using Palla \& Stahler (\cite{Palla99}) evolutionary
tracks; 8.  ages adopted from Gerbaldi at al. (\cite{Gerbaldi01}). The four entries
correspond to the ages computed with D'Antona \& Mazzitelli (\cite{Antona98}),
Palla \& Stahler (\cite{Palla99}), Siess et~al. (\cite{Siess00}) and Tout et~al. (\cite{Tout99})
evolutionary tracks, respectively; $^+$ data from Webb et~al. (\cite{Webb99});
$^*$ ages adopted from L86; $-$ data not available.
\par
\end{table}