\begin{table}%t1
\caption{Total crustal heating $Q_{\rm tot}$ for $A_{\rm i}=56$ and
$A_{\rm i}=106$.}\label{tab:Qtot}
\small%\centerline
 {
\begin{tabular}{ccc|c|c}
\hline \hline
 &Model&& $A_{\rm i}=56 $ &$A_{\rm i}=106 $ \\
 & pycno  & $\nu$ losses &  $Q_{\rm tot}$ &
  $Q_{\rm tot}$ \\
\hline
&&&& \\[-8pt]
 HZ*$^1$ & no blocking  &  none  & 1.93 MeV &
  1.48 MeV
\\
HZ03$^2$ & no blocking  &  maximal  & 1.58 MeV &
  1.16 MeV
\\
HZ*  & $Z_{\rm min}=6$  &    none & 1.93 MeV &
 1.44 MeV
\\
HZ*  & $Z_{\rm min}=4$  &  none  & 1.85 MeV &
  1.35 MeV
 \\
\hline
\end{tabular}}
\medskip
$^1$ Present paper, $^2$ \citet{HZ2003}. Third and fourth lines: results obtained when neutrino losses are suppressed  and  pycnonuclear fusion is blocked down to $Z_{\rm min}=6$
and $Z_{\rm min}=4$, respectively.
\end{table}