\begin{table}%T1
\caption{\label{app:symbols}Glossary of used symbols and units.}
%\centering
\par
\begin{tabular}{lll}
\hline\hline
sym. & unit & description\\
\hline
  $\rho$           & $\mbox{g}~\mbox{cm}^{-3}$      & gas density \\
  {\rhod}          & $\mbox{g}~\mbox{cm}^{-3}$      & dust density \\
  $n_{{\rm  g}}$ & $\mbox{cm}^{-3}$                & gas number density \\
  $n_{{\rm  d}}$ & $\mbox{cm}^{-3}$                & dust number density \\
  $u$              & $\mbox{cm}~\mbox{s}^{-1}$      & gas velocity \\ 
  $v$              & $\mbox{cm}~\mbox{s}^{-1}$      & dust velocity \\
  $J$              & $\mbox{erg}~\mbox{cm}^{-2}~\mbox{s}^{-1}$  & zeroth moment of the \\
                                                   & & radiation field \\
  $K_j$            & cm$^{-3}$                       & moments of the grain size \\
                                                   & & distribution; $0\le j\le3$ \\
  {\vdri}          & $\mbox{cm}~\mbox{s}^{-1}$      & drift velocity \\ 
  $S\ssD$          &                                 & speed ratio \\
  $C\ssD$          &                                 & drag coefficient \\
  $\varepsilon$    &                                 & fraction of specular collisions \\
  $\sigma$         & cm$^{2}$                        & gas-dust geom. cross section \\
  {\fdrag}         & $\mbox{g}~\mbox{cm}^{-2}\mbox{s}^{-2}$ & drag force \\
  {\qdrift}        & $\mbox{erg}~\mbox{cm}^{-3}\mbox{s}^{-1}$ & heating by drift \\
  {\mdrad}         & cm                              & mean grain radius\\
  $P$              & $\mbox{dyn}~\mbox{cm}^{-2}$    & gas pressure \\
  $T_{{\rm  g}}$ & K                               & gas temperature \\
  $T_{{\rm  d}}$ & K                               & dust temperature \\
  $S_{{\rm  g}}$ & $\mbox{erg}~\mbox{cm}^{-2}~\mbox{s}^{-1}~\mbox{ster}^{-1}$ & source function of the gas\\
  $\kappa_{{\rm  g}}$ & $\mbox{g}^{-1}~\mbox{cm}^{2}$ & (gray) gas opacity \\
  $\kappa_{{\rm  d}}$ & $\mbox{g}^{-1}~\mbox{cm}^{2}$ & (gray) dust opacity\\
  $c$              & $\mbox{cm}~\mbox{s}^{-1}$      & speed of light \\
  $k_{{\rm  B}}$ & $\mbox{erg}~\mbox{K}^{-1}$     & Boltzmann constant \\
  $G$              & $\mbox{dyn}~\mbox{g}^{-2}~\mbox{cm}^{2}$ & gravitational constant \\
  $\sigma_{{\rm  B}}$ & $\mbox{erg}~\mbox{cm}^{-2}~\mbox{s}^{-1}\mbox{K}^{-4}$ & Stefan-Boltzmann constant \\
                   &                                 & \\
  \multicolumn{3}{l}{Quantities specified at the outer boundary}\\[1.0ex]\hline\\
  $\dot{M}$        & {\mdotu}                        & mass loss rate \\
  {\uinf}          & $\mbox{cm}~\mbox{s}^{-1}$      & terminal velocity\\
  {\fcond}         &                                 & degree of condensation\\
  {\taud}          &                                 & dust optical depth\\
  {\sistd}         &                                 & standard deviation\\
                   &                                 & \\
  \multicolumn{3}{l}{Grain properties}\\[1.0ex]\hline
  \multicolumn{3}{l}{$K_0=n_{\rm d}$}\\
  \multicolumn{3}{l}{$K_1/K_0=\mdrad/r_0$; $r_0~[\mbox{cm}]$  -- monomer radius}\\
  \multicolumn{3}{l}{$K_2/K_0=\langle A\rangle/4\pi r_0^2$; $\langle A\rangle~[\mbox{cm}^2]$  -- mean grain surface area}\\
  \multicolumn{3}{l}{$K_3/K_0=\langle N\rangle$; $\langle N\rangle$  -- mean grain size}\\[1.0ex]\hline
\end{tabular}
\end{table}