\begin{table}%t1
\caption{Parameters and plasma $\beta$ for various astrophysical objects.}\label{tab1} 
%\centering
\par
\begin{tabular}{lcccc} 
\hline
\hline
Type of medium      & Density & Mag. field  & Temp & Plasma $\beta$  \\
Unit        &cm$^{-3}$&   & K   &   \\
\hline
Gas in supercusters of gal. &$10^{-6}$& 0.5 $\mu$G &$10^7$ & 0.14   \\
Gas in clusters of gal.   &$10^{-4}$& 1 $\mu$G &$10^7$ & 3.5  \\
Gas in galactic halos   &$10^{-3}$& 4 $\mu$G &$10^6$ &0.22 \\
Spiral arm interstellar gas.  &0.5  &   4 $\mu$G &$10^4$ &1.09 \\
Large interstellar shells-initial&0.8 &   4 $\mu$G &$10^3$ &0.3  \\
HI gas in diffuse clouds  & 3 &   5 $\mu$G & $100$ &0.04 \\
HII regions       & 5 &  10 $\mu$G &$10^4$ &1.74 \\
HI gas in interclumps   & 90  &  15 $\mu$G &$100$  &0.14 \\
HI gas in abs. initial    &100  &  15 $\mu$G & 10  &0.02 \\
Solar photosphere (spots) &$10^{17}$& 2 $\times$ $10^3$ G& $10^4$&0.8  \\
Solar corona      &$10^8$ & $10$ G   &$10^6$&$3.5\times10^{-3}$  \\
Magnetic stars      &$10^{10}$& $10^3{-}10^4$ G  &$10^6$&$3\times10^{-5}$  \\
Bipolar flows     &$10^3$ &  $10^{-4}$ G    & $10$&$3\times10^{-3}$\\
AGN nuclei      &$10^{10}$&$10^{-3}{-}10^{-1}$ G& $10^6{-}10^8$&0.3  \\
AGN jets    &$10^{-4}$&$10^{-5}{-}10^{-3}$ G&$10^6{-}10^7$&$10^{-2}$ \\
Neutron star surface    &$10^{12}$&$10^{12}$ G& $2\times10^{6}$&$10^{-20}$ \\
Magnetized white dwarfs      &$10^{12}$& $10^6$ G  &$10^6$&$10^{-8}$  \\
\hline
\end{tabular} 
\end{table}