\begin{table}%t2
%\centering
\par
\caption{\label{q}Prevailing charge-states of heavy ions in the supersonic solar wind and heliosheath.}
\begin{tabular}{l l l}
\hline
\hline
\noalign{\smallskip}
Species& Supersonic solar &Heliosheath\\
 &wind (high $q$) & (low $q$)\\
\hline
C&+4...+6& +1...+3\\
\par
N&+5...+7& +1...+4\\
\par
O&+5...+8& +1...+4\\
\par
Mg&+9...+12& +1...+8\\
\par
Si&+10...+14& +1...+9\\
\par
S&+8...+16&+1...+7\\\hline
\end{tabular}
\end{table}