\begin{table}%t1
    \caption{Overview of all the runs.    \label{tab:runs}}
%\centerline
 {    \begin{tabular}{lllll}
%       \multicolumn{5}{c}{\textsc{Model runs}} \\
        \hline
        \hline
        Model-id$^a$&   \multicolumn{3}{c}{Model Parameters}        & Notes \\
                    &   $R\ ^b$ & $\alpha_{\rm T}$   & $\delta$  &       \\
        \hline
        R1Ta4-P     &   1 AU     & $10^{-4}$             & 0.95      &  default model\\
        R1Ta2-P     &   1 AU     & $10^{-2}$             & 0.95      &  increased turbulence \\
        R1Ta6-P     &   1 AU     & $10^{-6}$             & 0.95      &  decreased turbulence \\
        R1Ta4-C     &   1 AU     & $10^{-4}$             & 2/3       &  compact model \\
        R5Ta4-P     &   5 AU     & $10^{-4}$             & 0.95      &  default model at 5AU \\
        R5Ta2-P     &   5 AU     & $10^{-2}$             & 0.95      &  increased turbulence \\
        R5Ta6-P     &   5 AU     & $10^{-4}$             & 0.95      &  decreased turbulence \\
        R5Ta4-C     &   5 AU     & $10^{-6}$             & 2/3       &  compact model \\
        \hline
    \end{tabular}}
\par
    \smallskip
        $^a$  Model names are intended to be mnemonic. "Rx'' stands for radius at x AU. Ta, denotes the strength of the turbulence, e.g., Ta4 stands for $\alpha_{\rm T} = 10^{-4}$. Finally, the suffix denotes whether models are porous (P) or compact (C).\\
        $^b$  At 1 AU quartz particles coagulate: $\rho_{\rm g}/\rho_{\rm d} = 240$, $\gamma=25\ {\rm ergs\ cm}^{-2}$, $\rho_{\rm s}=3.0\ {\rm g\ cm}^{-3}$; at 5~AU coagulation is between ices: $\gamma = 370\ {\rm ergs\ cm^{-2}}$, $\rho_{\rm s}=1.0\ {\rm g\ cm^{-3}}$, $\rho_{\rm g}/\rho_{\rm d} = 57$. The gas parameters correspond to a minimum mass solar nebula model (see Sect.~\ref{sec:environ}). 
\par
\end{table}