\begin{table}%t1
         \caption{Boundary parameters, plasma-only models.}
         \label{bcplas}
         %\centering
\par
             \begin{tabular}{lrrl}
            \hline\hline
            \noalign{\smallskip}
            Variable      &  {\rm 1~AU} & {\rm LIC} & {\rm [units]} \\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
            proton density & 7      &    0.06 & {[{cm$^{-3}$}]}\\
            velocity     & 375    &   26.4  & {[{km~ s$^{-1}$}]}\\
            temperature  & 73~640 & 6530    & {[{K}]} \\
            \hline
            \end{tabular}
      \end{table}