\begin{table}%T4
\caption{\label{tb:fitkq}Coefficients and exponents for the best fit for the disk\protect formation efficiency.}
\small
%\centering
$$
\begin{tabular}{c r @{.} l c r @{.} l cc}
\hline\hline
Coefficient & \multicolumn{2}{c}{Value} & Coefficient & \multicolumn{2}{c}{Value} & Exponent & Value \\
\hline
$k_1$ &  2&08  & $k_5$ & $-0$&106 & $q_1$ & 0.236 \\
$k_2$ &  0&020 & $k_6$ & $-1$&539 & $q_2$ & 0.255 \\
$k_3$ &  0&035 & $k_7$ & $-0$&470 & $q_3$ & 0.537 \\
$k_4$ &  0&914 & $k_8$ & $-0$&344 & & \\
\hline
\end{tabular}
$$
\end{table}