\begin{table}%t2 \caption{\label{comQ}The first column yields the $Q_{VIJ[sp]}$ indices used in this work; the second column shows the number of stars with excess detected with each $Q_{VIJ[sp]}$ index; the third column shows the total number of stars for which we compute the indices.} \small%\centerline { \begin{tabular}{ccc} \hline \hline $Q$ index& Number of stars with excess & Number of stars \\ \hline $Q_{VIJ[3.6]}$ &113 &1746\\ $Q_{VIJ[4.5]}$ &124 &1474\\ $Q_{VIJ[5.8]}$ & 79 & 357 \\ $Q_{VIJ[8.0]}$ &104 & 297 \\ \hline \end{tabular}} \smallskip A total of 174 stars with excesses are selected. \end{table}