\begin{table}%t3
\caption{\label{tab:model}Model atmospheres of $\te=20~000$~K, and $\log g=8.0$ (cgs units),
   with pure hydrogen or pure iron composition. }
%\centering
\par
\begin{tabular}{ccccccc}
\hline \hline  \\[-3mm]
\noindent{ H model }\hfil  \\[2pt]
$\tau_{\rm std}$& $T$    &   $P_{\rm g}$  &$\rho_{\rm ROG}$&$\rho_{\rm ID}$&{\it OPSTD}&${\it HGT} -$ cm\\[1mm]
1.0000E-10&1.1787E+04&1.7938E-02&9.2253E-15&9.2241E-15&5.5747E-01&0.0000E+00\\
1.0000E-06&1.1787E+04&9.6360E+01&4.9551E-11&4.9611E-11&1.5151E+00&1.6705E+05\\
1.0000E-03&1.3906E+04&6.3030E+03&2.7472E-09&2.7560E-09&2.7532E+01&2.5270E+05\\
1.0000E-01&1.7834E+04&1.0314E+05&3.5055E-08&3.5228E-08&1.4934E+02&3.2323E+05\\
1.0000E+00&2.5032E+04&6.0435E+05&1.4629E-07&1.4709E-07&2.4124E+02&3.8450E+05\\
1.0000E+02&6.0790E+04&2.3710E+07&2.3641E-06&2.3726E-06&6.4096E+02&6.3574E+05\\
2.6102E+02&6.7564E+04&4.5851E+07&4.1132E-06&4.1262E-06&8.0050E+02&7.0605E+05\\[2mm]
\noindent{ Fe model  }  \\[2pt]
$\tau_{\rm std}$& $T$    &   $P_{\rm g}$  &$\rho_{\rm ROG}$&$\rho_{\rm ID}$&{\it OPSTD}&${\it HGT} -$ cm\\[1mm]
1.0000E-10&1.1411E+04&1.6666E-01&3.6337E-13&3.2686E-12&5.9939E-02&0.0000E+00\\
1.0000E-06&1.2684E+04&1.6718E+02&3.2779E-10&2.9763E-09&1.0046E+00&3.2555E+04\\
1.0000E-03&1.4567E+04&9.1482E+03&1.5621E-08&1.4709E-07&3.8319E+01&5.4919E+04\\
1.0000E-01&1.7476E+04&6.0067E+04&8.5492E-08&7.8795E-07&2.8835E+02&6.7055E+04\\
1.0000E+00&2.2247E+04&2.2637E+05&2.5312E-07&2.2825E-06&5.7911E+02&7.7449E+04\\
1.0000E+02&5.5742E+04&9.6135E+06&4.2901E-06&2.4393E-05&1.2986E+03&1.3145E+05\\
2.6102E+02&6.3817E+04&1.7025E+07&6.6363E-06&3.6046E-05&3.4230E+03&1.4520E+05\\[2pt]
\hline
\end{tabular}
\end{table}