\begin{table}%t1
\caption{\label{parameters}Equilibrium model parameters for the moderate and strong flux sheets.}
%\centering
\par
\begin{tabular}{llcccc}
\hline\hline
\multirow{2}{*}{Physical quantity} & & \multicolumn{2}{c}{Moderate field} 
                                                     & \multicolumn{2}{c}{Strong field} \\
\cline{3-6}
& & Sheet axis & Ambient medium & Sheet axis & Ambient medium\\
\cline{1-6}
\multirow{2}{*}{Temperature [K]} &  & 9142 & 9142 & 9142 & 9142 \\
 & & 4758 & 4758 & 4758 & 4758\\[0pt]
\multirow{2}{*}{Density [g cm$^{-3}$]}     &  \rule{0pt}{10pt}
                                                                & $1.2 \times 10^{-12}$ &  $2.4 \times 10^{-12}$ 
                                                                & $1.2 \times 10^{-12}$ &  $6.0 \times 10^{-12}$ \\[0pt]
 &  & $1.4 \times 10^{-7}$ & $2.7 \times 10^{-7}$ & $1.4 \times 10^{-7}$ 
                                                                              & $6.7 \times 10^{-7}$\\
\multirow{2}{*}{Pressure [dyn cm$^{-2}$]} &  & 1.3 & 2.7 & 1.3 & 6.6 \\
 &  & $4.2 \times 10^{4}$& $8.3 \times 10^{4}$ & $ 4.2 \times 10^{4}$ 
                                                                           & $20.6 \times10^{4}$ \\
\multirow{2}{*}{Sound speed [km s$^{-1}$]} &  & 13.5 & 13.5 & 13.5 &  13.5\\
 &  & 7.1 & 7.1 & 7.1 & 7.1\\
\multirow{2}{*}{Alfv\'en speed [km s$^{-1}$]} & & 304 & 212 & 582 & 259 \\
 & & 6 & 0.9 & 12  & 0.6 \\
\multirow{2}{*}{Magnetic field [G]} & & 119 & 117 & 229 & 225 \\
 & & 801 & 17 & 1601 & 18\\
\multirow{2}{*}{Plasma $\beta$ [--]} & \rule{0pt}{10pt}
                                                      & $2.0 \times 10^{-3}$  & $5.0 \times 10^{-3}$ 
                                                      & $6.0 \times 10^{-4}$  & $3.0 \times 10^{-3}$\\
 &  & 1.7 & $7.4 \times 10^{3}$ & 0.4 & $1.6 \times 10^{4}$\\
\cline{1-6}
\end{tabular}
\end{table}