\begin{table}%t3
%\centering
\par
 \caption{Typical values of the relevant parameters in the upper radiation zone of the Sun, and values adopted for the numerical simulations (in cgs units). \label{tablecoeff}} 
\begin{tabular}{*{5}{c}} 
   \hline \hline
   Parameter & Symbol & Sun & Case A & Case B  \\ 
   \hline     
   \noalign{\smallskip}
  thermal diffusivity & $\kappa$ & $10^7$ & $8 \times 10^{12}$ & $8 \times 10^{12}$ \\
    magnetic diffusivity & $\eta$ & $10^3$ & $8 \times 10^{10}$ & $8 \times 10^{9}$ \\
    viscosity & $\nu$ & $30$ & $8 \times 10^{9}$  & $8 \times 10^{9}$\\  
        buoyancy frequency & $N_t$ & $ 2.1 \times 10^{-3}$ & $ 3 \times 10^{-4}$ &$ 3 \times 10^{-4}$\\
       rotation frequency & $\Omega$ & $3 \times 10^{-6}$ & $3 \times 10^{-6}$ & $3 \times 10^{-6}$\\
          \hline 
\end{tabular}
\end{table}