\begin{table}%t2
 \caption{Model parameters for IRS~63 and Elias~29.} \label{tab: model params}	
\par
%\centerline
 {\small\begin{tabular}{lcc}
 \hline \hline
 & IRS~63			& Elias~29			\\
\hline
\multicolumn{3}{l}{Modelling parameters and results}\\
Stellar luminosity ({\it fixed})& 0.79~$L_\odot$& 13.6~$L_\odot$	\\
Disk inner radius ({\it fixed})				& 0.1~AU	& 0.25~AU		\\
Disk outer radius, $R_0$				& 100~AU	& 200~AU	\\
Disk height at outer radius, $H_0$/$R_0$ ({\it fixed})& 0.17				& 0.17\\
Envelope outer radius ({\it fixed})& 10~000~AU			& 10~000~AU			\\
 Centrifugal radius, $R_{\rm rot}$			& 100~AU			& 300~AU			\\
Inclination						& 30$^\circ$			& 30$^\circ$			\\
Disk mass, $M_{\rm disk}$				& 0.13~$M_\odot$		& 0.004~$M_\odot$		\\
Envelope mass, $M_{\rm env}^{\rm a}$			& 0.022~$M_\odot$		& 0.025~$M_\odot$		\\
 \hline
 \multicolumn{3}{l}{Empirical results}\\
$M_{\rm env}^{a}$ [$M_\odot$]			& $0.058$			& $\leq $0.058			\\
$M_{\rm disk}$ [$M_\odot$]				& $0.055$			& $\leq $0.007			\\
$M_{\rm star}^{b}$ [$M_\odot$]			& $0.37 \pm 0.13$		& $2.5 \pm 0.6$			\\
\hline
\end{tabular}}
\medskip
$^{a}$ The envelope mass is defined as the mass, not contained in the disk, within a single-dish radius, i.e., 30$\arcsec$ or 3750~AU for IRS~63, and 20$\arcsec$ or 2500~AU for Elias~29.
\par
$^{b}$ Assuming an inclination $i = 30^\circ$ (Sect.~4.2 for discussion).
\end{table}