\begin{table}%t2
\caption{\label{tab:encounter_rate_parameter_space}Typical stellar encounter parameters.}
%\centerline
 {\small  \begin{tabular}{llllc}
\hline\hline\noalign{\smallskip}
Mass groups &  $m_{\star}$  &  $r_{{\rm enc}}$ &  $v_{{\rm enc}}$  & $\gamma_{{\rm enc}}$   \\
&  [$\Msun$]   &  [AU] &  [AU/yr] & \\
\hline\noalign{\smallskip}
low mass  &  $0.1{-}1$ &  $10^{2-3}$ & $\sim$0.3 & $10^{-1}$  \\
intermediate mass  &  $1{-}10$ &  $10^{2-2.5}$ &  $\sim$2 &  $1$ \\
high mass &  10--100&  $10^{2}$ &  $\sim$6 &  10 \\
\hline
\end{tabular}}
\medskip
{Note: the first column denotes the three mass groups,
the second column contains the adopted mass ranges, $m_{\star}$, while in the third typical interaction radii, $r_{{\rm enc}}$, are listed
for each mass group. In the last two columns the resulting ``encounter escape speeds'', $v_{{\rm enc}}$, and the ``gravitational focusing
parameter'', $\gamma_{{\rm enc}}$, are noted (see text for definitions of these quantities).}
\end{table}