\begin{table}%t1 \caption{\label{sterren}List of stellar parameters for our sample sources.} %\centerline {\small \begin{tabular}{llrrcccrrcl} \hline \hline Name & $\alpha$ (J2000) & $\delta$ (J2000) & $T_{\rm eff}$ & $\log g$ & [Fe/H] & $P_{\rm orb}$ & $e$ & $E(B-V)_{\rm tot}$ & $L_{\rm IR}/L_*$ & $d$\\ & (h m s) & ($^\circ$ $'$ $''$) & (K) & (cgs) & & (days) & & & (\%) & (kpc)\\ \hline EP~Lyr & 19 18 17.5 & $+$27 50 38 & 7000 & 2.0 & $-1.5$ & & & $0.51\pm0.01$ & $3\pm0$ & $3.2\pm1.0$\\ HD~52961 & 07 03 39.6 & $+$10 46 13 & 6000 & 0.5 & $-4.8$ & 1310 & 0.21 & $0.06\pm0.02$ & $12\pm1$ & $1.6\pm0.5$\\ \hline \end{tabular}} \par \medskip Note: Listed are the name, equatorial coordinates $\alpha$ and $\delta$(J2000), effective temperature $T_{\rm eff}$, surface gravity $\log g$, and metallicity [Fe/H] of our sample stars. For the model parameters we refer to \citet{deruyter06}. Also given are the orbital period and the eccentricity \citep[see references in][]{deruyter06,gielen07}. The total reddening $E(B-V)_{\rm tot}$, the energy ratio $L_{\rm IR}/L_*$ and the calculated distance, assuming a luminosity of $L_*=3000\pm2000$~$L_{\odot}$. \end{table}