\begin{table}%t1
\caption{\label{tab:abu}Relative abundances and ionization energies of first
         ionization for the eleven most abundant elements in the
         solar photosphere.}
%\centering
\par
\begin{tabular}{cccc}
  \hline\hline
    AN   & Name & ~$ \nu_{\rm i} ~$  & ~$ \chi_{\rm i}~~~ [\rm eV]~$  \\
   \hline
        1 &    H  &  0.934042096 &  13.600 \\
    \hline
       2 &   He  &  0.064619943 &  24.580\\
   \hline
        6 &    C  &  0.000371849 &  11.256\\
   \hline
       7  &   N  &  0.000091278 &  14.529\\
    \hline
      8  &   O  &  0.000759218 &  13.614\\
    \hline
     12  &  Mg  &  0.000035511 &   7.644\\
    \hline
      11 &   Na &   0.000001997 &   5.138\\
    \hline
      20 &   Ca &   0.000002140  &  6.111\\
    \hline
      26 &   Fe &   0.000039844 &   7.896\\
    \hline
     14 &   Si &   0.000033141 &   8.149\\
   \hline
      13 &   Al &   0.000002757 &   5.984\\
  \hline
 \end{tabular}
 \end{table}