\begin{table}%t4
\caption{\label{model}Model results, reduced $\chi^2$ ($\chi^2_{\rm red.}$) assuming a fixed outer radius ($R_{\rm OUT}$) of 150~AU and a maximum grain size ($a_{\rm max}$) of 3~mm.}
\par
%\centering
\par
\begin{tabular}{lllllll}
\hline
\hline
\multicolumn{1}{l}{} & 
\multicolumn{1}{l}{HD~104860}&
\multicolumn{1}{l}{HD~8907}& 
\multicolumn{1}{l}{HD~377}&
\multicolumn{1}{l}{HD~107146}& 
\multicolumn{1}{l}{HD~61005 }& 
\multicolumn{1}{l}{HD~191089} \\
\hline
$M_{\rm dust}/M_{\oplus}$&$0.082\pm0.007$& $0.040\pm0.005$   &$0.058\pm0.013$ 	&$0.110\pm0.008$&$0.261\pm0.023$ & $0.110\pm0.037$
\\
$R_{\rm in}$ [AU]	&$21\pm5$&$27.8\pm13.9$ &$6.1\pm0.8$ &$10.2\pm0.8$	        &$95.6\pm23$&$79\pm98$
\\
$a_{\rm min}$ [$\mu$m]&$8\pm2$&$6\pm2$&$14\pm5$&$8.6\pm1.2$&$0.4\pm0.3$   	        &$0.23\pm0.78$
\\
$\chi^2_{\rm red.}$ & 2.6&4.3  &5.0 &4.5&16.3 &8.7\\
\hline
\end{tabular} 
\end{table}