\begin{table} \caption{\label{check}Model results leaving as free parameters using $M_{\rm dust}/M_{\oplus}$, $R_{\rm in}$ and $a_{\rm min}$ for 6 different outer radii: 1000, 500, 300, 150, 100 and 50~AU.} \par %\centering \par \begin{tabular}{rrrrrrr} \hline \hline \multicolumn{7}{c}{HD~104860}\\ \multicolumn{1}{c}{$R_{\rm OUT}$} & \multicolumn{1}{c}{1000~AU} & \multicolumn{1}{c}{500~AU} & \multicolumn{1}{c}{300~AU} & \multicolumn{1}{c}{150~AU} & \multicolumn{1}{c}{100~AU} & \multicolumn{1}{c}{50~AU} \\ \hline $M_{\rm dust}/M_{\oplus}$& $5.843\pm0.652$& $2.930\pm0.245$ &1.774 0.133 & $0.082\pm0.007$ &$0.053\pm0.005$ & $0.039\pm0.004$\\ $R_{\rm in}$ [AU]& $185\pm 23$ & $20.3\pm7.8$ & $20\pm7$ & $21\pm5$ &$22\pm2$&$30\pm3$\\ $a_{\rm min}$ [$\mu$m] & $0.07\pm0.03$ & $4.5\pm0.9$ & $6\pm2$ & $8\pm5$ &$11\pm2$ & $21\pm4$\\ $\chi^2_{\rm red.}$ & 6.1 & 7.0 & 4.1 & 2.6&2.7& 3.0\\ \hline \multicolumn{7}{c}{HD~8907}\\ \multicolumn{1}{c}{$R_{\rm OUT}$} & \multicolumn{1}{c}{1000~AU} & \multicolumn{1}{c}{500~AU} & \multicolumn{1}{c}{300~AU} & \multicolumn{1}{c}{150~AU} & \multicolumn{1}{c}{100~AU} & \multicolumn{1}{c}{60~AU} \\ \hline $M_{\rm dust}/M_{\oplus}$ & $3.097\pm184$ & $1.614\pm0.099$ &$0.931\pm0.050$ & $0.040\pm0.005$ & $0.024\pm0.002$ & $0.017\pm0.003$\\ $R_{\rm in}$ [AU] & $89\pm14$ & $29\pm14$ &$19.4\pm5.4$ & $27\pm17$ & $27\pm7$ & $41\pm15$\\ $a_{\rm min}$ [$\mu$m] & $0.5\pm0.08$ & $3.1\pm0.8$ &$5.6\pm1.1$ & $6\pm2$ & $8\pm2$ & $7.7\pm2.6$\\ $\chi^2_{\rm red.}$ & 22.8 & 17.8 &9.2 & 4.3 &3.6 &3.5\\ \hline \multicolumn{7}{c}{HD~377}\\ \multicolumn{1}{c}{$R_{\rm OUT}$} & \multicolumn{1}{c}{1000~AU} & \multicolumn{1}{c}{500~AU} & \multicolumn{1}{c}{300~AU} & \multicolumn{1}{c}{150~AU} & \multicolumn{1}{c}{100~AU} & \multicolumn{1}{c}{60~AU} \\ \hline $M_{\rm dust}/M_{\oplus}$ & $3.655\pm0.507$ & $2.649\pm0.322$ & $1.339 \pm0.367$& $0.058\pm0.013$ & $0.034\pm0.006$ & $0.039\pm0.012$\\ $R_{\rm in}$ [AU] & $70\pm12$ & $4.6\pm1.1$ &$4.6\pm0.65$& $6.1\pm0.8$ & $38\pm8$ & $51\pm8$\\ $a_{\rm min}$ [$\mu$m] & $0.02\pm0.001$ & $6.5\pm1.5$ &$9.1\pm3.5$& $14\pm5$ &$14\pm4$&$38\pm20$\\ $\chi^2_{\rm red.}$ & 8.6 & 7.7 &4.6& 5.0&395.&395.\\ \hline \end{tabular} \end{table}