\begin{table}%t1
\caption{Elemental abundances with respect to the number of protons. Number in parenthesis refer to powers of ten.  \label{elem_abund}}
\small%\centering
\par
\begin{tabular}{lcc}
\hline
\hline
Element  & Warm-core & Low-metal  \\
\hline
He & 0.10 & 0.10     \\
O & 3.0(--4) & 1.8(--4)   \\
N & 8.0(--5)& 2.1(--5)  \\
C & 2.0(--4) & 7.3(--5)  \\
S & 1.86(--5)  & 8.(--8)\\
Fe & 4.0(--7) & 2.0(--8)  \\
\hline
\end{tabular}
\end{table}