| Abstract | The first radial velocity curves for BS Vul have been obtained. Combined with new light curve data, simultaneous Roche-based light curve analyses have been carried out using the 2003 version of the Wilson-Devinney code. New values for the masses, radii, and luminosities have been obtained: M1 = 2.03 (8) M ʘ, M 2 = 0.68 (3) M ʘ, R1 = 1.71 (2) Rʘ, R2 = 1.03 (2) Rʘ, L1 = 5.4 (5) L ʘ, and L 2 = 0.41 (4) L ʘ. Comparison with re-modelled data from De Bernardi and Skaltriti (1979) revealed good agreement although temperature T2 there seemed to be significantly lower. There was also reasonable agreement with the results from the photometric analysis of Zhu et al. (2012). Reference to the sample of close binary stars from Yakut and Eggleton (2005) and the ZAMS suggests that both stars are evolved. |
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