\begin{table}%t4
%\centering
\par
\caption{Simulation parameters for the circumbinary disk.
\label{tab:paramCB}}
$$
\begin{tabular}{@{}l@{\ =\ }ll@{\ =\ }l@{}}
\hline\hline
$M_{\star1}$ & $0.5\ M_\odot$ &
$a$ & $ 35~\rm  AU\qquad\qquad ${\it e}$\ =\ 0.25$ \\
$M_{\star2}$ & $0.65\ M_\odot$ &
$s$ & 10, 7.5, 5, 2.5, 1~$\mu$m \\
%$e$ & $ 0$ \\
%\multicolumn{2}{c}{} & $s$ & 10, 7.5, 5, 2.5, 1~$\mu$m \\
$M_{\rm gas}$ & $0.13\ M_\odot$ &
$C_{\rm s}$ & $C_0~r^{-3/8}$, $C_0=297.9$ m~s$^{-1}$ \\
$M_{\rm dust}$ &$0.01\ M_{\rm gas}$ & $\Sigma$ & $\Sigma_0~r^{-3/2}$ \\
$R_{\rm disk}$ & 100 to 400 AU & $\alpha_{\rm SPH}$ & $\zeta=0.1$ \\
$\rho_{\rm d}$ & 1.0 g~cm$^{-3}$ & $\beta_{\rm SPH}$ & 0.0 \\
\hline
\end{tabular}
$$
\end{table}