\begin{table}%t2 \caption{ Key properties of very massive binaries (50~\Msun + 25~\Msun) as described in Sect.~\ref{bin:lmc} (see also Table~\ref{tab:smc} and Sect.~\ref{bin:hil}). In the last column we indicate which component fills its Roche lobe first. \label{tab:lmc} } %\centering \par \small \begin{tabular}{c c c c c c c c c c c} \hline\hline \noalign{\smallskip} $P_{\rm orb} (d)$ & $t_{\rm RL}$(Myr) & X$_{\rm He,~center}$ & X$_{\rm He,~surface}$ & $\log \epsilon ({\rm N}^{14})$ & $ {^{}{\rm B}_{\rm RL}/^{}{\rm B}_{\rm init}}$ & $ {^{}{\rm C}_{\rm RL}/^{}{\rm C}_{\rm init}}$ & $ {^{}{\rm N}_{\rm RL}/^{}{\rm N}_{\rm init}}$ & $\langle \varv_{\rm eq}\rangle$~(km~s$^{-1}$) & $\varv_{\rm eq,~RL}$~(km~s$^{-1}$) & RLOF\\ \hline \noalign{\smallskip} %$\times10^{-6}$ 1.5 & 3.4 & 0.68 & 0.56 & 8.30 & $2.0\times10^{-6}$ & $9.0\times10^{-2}$ & 37 & 304 & 315 & Sec.\\ 1.6 & 3.7 & 0.75 & 0.63 & 8.37 & $6.6\times10^{-7}$ & $9.1\times10^{-2}$ & 37 & 289 & 307 & Sec.\\ 1.7 & 4.0 & 0.81 & 0.66 & 8.41 & $4.7\times10^{-7}$ & $9.5\times10^{-2}$ & 37 & 277 & 310 & Sec.\\ 1.8 & 2.9 & 0.64 & 0.38 & 8.06 & $2.8\times10^{-4}$ & $2.3\times10^{-1}$ & 30 & 262 & 315 & Prim.\\ 2.0 & 2.6 & 0.61 & 0.30 & 7.90 & $2.4\times10^{-3}$ & $4.0\times10^{-1}$ & 23 & 240 & 305 & Prim.\\ 2.5 & 2.6 & 0.66 & 0.26 & 7.41 & $8.1\times10^{-3}$ & $7.4\times10^{-1}$ & 8.0 & 200 & 279 & Prim.\\ 3.0 & 2.8 & 0.71 & 0.25 & 7.28 & $1.3\times10^{-2}$ & $7.8\times10^{-1}$ & 6.0 & 172 & 261 & Prim.\\ 3.5 & 2.9 & 0.75 & 0.25 & 7.26 & $1.8\times10^{-2}$ & $8.0\times10^{-1}$ & 5.7 & 152 & 248 & Prim.\\ 4.0 & 3.0 & 0.78 & 0.25 & 7.27 & $2.4\times10^{-2}$ & $7.9\times10^{-1}$ & 6.0 & 137 & 236 & Prim.\\ \hline \end{tabular} \end{table}