Time evolution for Na i D₁ (lower panel) and Ca i λ6717.7 (upper panel) on three quiescence epochs (−672,  −530 and +742). The vertical gray strip indicates the radial velocity range of the M giant during the orbital period (± 16.2 km s^-1, Fekel et al. 2000). The dashed curve in the lower panel is the line profile of the K giant star HD 32887 (Da Silva et al. 2006), veiled to 30% of its original depth and placed at the velocity deduced from Ca i λ6718 for day  −530.