\begin{table}%t1
\par
\caption{\label{init}Nominal case set up.}
%\centerline
 {
\begin{tabular}{cc}
\hline\hline
Radial extent$^a$  
& $10<r<100$~AU\\
Radial surface density profile & $\Sigma \propto r^{-0.5}$\\
Number of test particles $N$ & $5\times10^4$\\
Size range$^b$ & $\beta(s_{\max})=0.025<\beta(s)<\beta(s_{\min})=0.4$\\
Normal rebound coef. $\epsilon_{\rm N}$ & --0.3\\
Transverse rebound coef. $\epsilon_{\rm T}$ & 1\\
Size distribution & ${\rm d}N(s) \propto s^{-3.5}{\rm d}s$\\
Inflated radius (in AU)&  $s_{\rm num}=10^{-4} \times (s/s_{\min})$\\
Initial dynamical excitation$^c$ & $\langle e_{\rm dyn} \rangle = \langle i\rangle = 0$\\
\hline
\end{tabular}}
\medskip
\par
$^a$ Initial location of particles' \emph{periastron}.\\
$^b$ As parameterized by $\beta \propto 1/s$.\\
$^c$ The value for $\langle e_{\rm dyn} \rangle$ is that
of hypothetical large particles with \mbox{$\beta=0$}, not taking into account the eccentricity component due to radiation pressure.
\end{table}