\begin{table}%t3
\caption{\label{tab:best_fitBC}Best-fit model parameters for B/C~data only ($L=4$~kpc).}
%\centering
\par
\begin{tabular}{lcccccc} 
\hline\hline \noalign{\smallskip}
Model    & $K_0^{\rm best}\times 10^2$     & $\delta^{\rm best}$ &  $V_{\rm c}^{\rm best}$  &  $V_{\rm a}^{\rm best}$  & $\chi^2$/d.o.f.   \\
Data        & (kpc$^2$~Myr$^{-1}$) &        &  (km$\;$s$^{-1}$)  & (km$\;$s$^{-1}$)   & \\
\hline
I-F  & 0.42 & 0.93 & 13.5 & \dots&  11.2  \\  
II-F & 9.74 & 0.23 & \dots& 73.1 &  4.68  \\  
III-F& 0.48 & 0.86 & 18.8 & 38.0 &  1.47  \\  
\hline
\end{tabular}
\end{table}