\begin{table}%t6
\caption{\label{tab: model parameters}Model parameters.}
\par
%\centering
\par
 \begin{tabular}{lcc}
\hline \hline \noalign{\smallskip}
	   Parameter					& Standard			&Range				\\
\hline
Mass $M_{\rm star}$	& 1.0~$M_\odot$			&				\\
	   $T_{\rm eff}$				& 3000~K			& 3000~K, 4000~K		\\
	   Luminosity $L_{\rm star}$			& 1.0~$L_\odot$			& 1.0~$L_\odot$, 6.0~$L_\odot$	\\	
	   Radius $R_{\rm star}$			& 3.7~$R_\odot$			& 3.7~$R_\odot$, 5.1~$L_\odot$	\\
\hline \noalign{\smallskip}
Mass $M_{\rm disc}$ ($M_\odot$)		& $5 \times 10^{-3}$		&				\\
	   Disc inclination angle $i$ ($^\circ$)	& 45				& 5.7, 15, 30, 45, 60, 75	\\
	   Surface mass density gradient $n$		& --1.0				&				\\
	   Gas-to-dust ratio $\Psi$			& 100				&				\\
	   Inner radius $R_{\rm in}$ (AU)		& 0.1				&				\\
   Outer radius $R_{\rm out}$ (AU)		& 300				& 100, 200, 300			\\
\hline
   Minimum grain size $a_{\rm min}$ ($\mu$m)	& 0.003				&				\\
   Maximum grain size $a_{\rm max}$ ($\mu$m)	& 				& 0.1, 1, 10, 100,		\\
	   						&				& 1000, 10000			\\
	   Power-law slope $m$				& 3.5 & 2.5, 3.0, 3.5, 4.0	\\
\hline
\end{tabular}
\end{table}