\begin{table}%t2
%%\centering
\par
\caption {\label{t:table2}Fraction of mass ($\alpha$) lost by less evolved stars assuming various
ranges of polluter masses and either $x=-2.3$ or the Kroupa (\cite{Kroupa01}) mass function). }
\begin{tabular}{ccccc}
\hline \hline
\noalign{\smallskip}
Polluters  &\multicolumn{2}{c}{Mass fraction} & $\alpha$ & Original   \\
Mass range & in stars of               & in polluters  &          & ratio      \\
($M_\odot$)& 0.2-$M_{\rm min}~M_\odot$ & mass range    &          & 1st gen/GC \\
\hline
\multicolumn{5}{c}{$x=-2.3$}\\
7--8   &     0.795        &	0.0147	   &0.0138  &   30.3 \\
6--7   &     0.778        &	0.0169     &0.0169  &   25.4 \\
5--6   &     0.756        &	0.0214     &0.0214  &	20.7 \\
4--5   &     0.727        &  0.0288     &0.0280  &   16.3 \\
\hline
\multicolumn{5}{c}{Kroupa mass function}\\
7--8   &     0.889        &	0.0102	   &0.00715 &   48.8 \\
6--7   &     0.878        &	0.0123     &0.0109  &   36.2 \\
5--6   &     0.864        &	0.0153     &0.0111  &	32.6 \\
4--5   &     0.845        &  0.0199     &0.0150  &   24.9 \\
\hline
\end{tabular}
\end{table}