Abstract
The first radial velocity curves for V404 And 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 = 0.870 (11) M ʘ, M 2 = 0.706 (9) M ʘ, R1 = 1.10 (13) Rʘ, R2 = 1.37 (13) Rʘ, L1 = 0.75 (7) L ʘ, and L 2 = 0.87 (8) L ʘ. Reference to the sample of close binary stars from Yakut and Eggleton (2005) and the ZAMS indicates that both stars are evolved. Further, the system may have been a classical Algol in the past but with the secondary then contracting, yielding the near semi-contact binary that we have today.
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