\begin{table}%t3
    \caption{\label{tab:SD_visible}Contributions to the local surface density of baryonic matter.
             The total values in the last row include $\pm 1\sigma$ errors.}
        %\centering
\par
    \begin{tabular}{c|c|c}\hline\hline
      Contribution     & $\Sigma$ [$M_\odot$ pc$^{-2}$] & Reference \\\hline
      Visible stars    & $35 \pm 5$ & \citet{Gilmore:1989mw}\\
		       & 27         & \citet{Gould:1995tf}\\ 	
		       & 30         & \citet{Zheng:2001wc}\\\hline 
      Stellar remnants & 3 $\pm$ 1  & \citet{Mera:1998qg}\\\hline 
      Interstellar gas & 8 $\pm$ 5  & \citet{Dame:1993mw}\\\hline
                       & 13--14    & \citet{Olling:2001yt}\\ \hline
      Total            & 35-58      &\\ \hline
    \end{tabular} 
\end{table}