\begin{table}%t8
%\centering
\par
\caption{Parameters for main sequence evolution for different progenitor masses $M_{\star}$ (from Chevalier \cite{Chevalier99} and references therein).
$\dot{M}_{{\rm loss}}$ is the mass loss rate,
$L_{{\rm w}}$ is the mechanical wind luminosity,
$t_{{\rm ms}}$ is the main-sequence age and~$r_{{\rm b}}$ is the
maximum size of the wind bubble.\label{MSstars}}
\begin{tabular}{lllllr}
\hline \hline
\multicolumn{1}{c}{$M_{\star}$} & \multicolumn{1}{c}{Spectral} & \multicolumn{1}{c}{$\dot{M}_{{\rm loss}}$} & \multicolumn{1}{c}{$L_{{\rm w}}$} & \multicolumn{1}{c}{$t_{{\rm ms}}$} & \multicolumn{1}{c}{$r_{{\rm b}}$} \\
\multicolumn{1}{c}{(${M}_{\odot}$)} & \multicolumn{1}{c}{type} & \multicolumn{1}{c}{(${M}_{\odot} \: {\rm yr}^{-1}$)} & \multicolumn{1}{c}{(erg s$^{-1}$)} & \multicolumn{1}{c}{(yr)} & \multicolumn{1}{c}{(pc)}  \\ \hline
12 & B1 V & $6 \times 10^{-9}$ & $9.3 \times 10^{32}$ & $1.3 \times 10^{7}$ & 5.3 \\
16 & B0 V & $6 \times 10^{-8}$ & $9.3 \times 10^{33}$ & $0.9 \times 10^{7}$ & 10.0 \\ \hline
\end{tabular}
\end{table}