\begin{table}%t1 \caption{\label{tab:sample}General characteristics of the sample.} \par %\centering \small \begin{tabular}{lllrrrrrrrrr} \hline\hline IRAS & HD & sp. type & \multicolumn{1}{c}{$\alpha_{2000}$} & \multicolumn{1}{c}{$\delta_{2000}$} & \multicolumn{1}{c}{l} & \multicolumn{1}{c}{b} & \multicolumn{1}{c}{m(v)} & $T_{\rm eff}$(K) & $\log$~$g$ & [Fe/H] & Reference \\ \hline 08544$-$4431 & V390 Vel & F3 & 08 56 14.18 & $-$44 43 10.7 & 265.51 & +0.39 & 9.13 & 7250 & 1.5 & $-$0.5 & \citet{maas05} \\ 12222$-$4652 & HD~108015 & F3Ib & 12 24 53.50 & $-$47 09 07.5 & 298.25 & +15.48& 7.95 & 7000 & 1.5 & $-$0.1 & \citet{vanwinckel97}\\ & NSV 5601 & & & & & & & & & & \\ 14524$-$6838 & HD~131356 & F2Ib & 14 57 00.69 & $-$68 50 22.9 & 313.90& --8.68 & 8.77 & 6000 & 1.0 & $-$0.7 & \citet{vanwinckel97} \\ & EN TrA & & & & & & & & & & \\ 15469$-$5311 & & F3 & 15 50 43.80 & $-$53 20 43.3 & 327.82 & +0.63 & 10.56 & 7500 & 1.5 & 0.0 & \citet{maas05} \\ 19125$+$0343 & & F2 & 19 15 01.17 & $+$03 48 42.7 & 39.02 & --3.49 & 10.16 & 7750 & 1.0 & $-$0.5 & \citet{maas05}\\ 19157$-$0247 & & F3 & 19 18 22.71 & $-$02 42 10.8 & 33.59 & --7.22 & 10.70 & 7750 & 1.0 & $-$0.4 & \citet{maas05} \\ \hline \end{tabular} \end{table}