Maximal amplitude of the periodic signal, Δ_m, for a pair of stars of mass M_⋆, 1 and M_⋆, 2 (left panel). The period is fixed to the observed P_l = 262 days, which imposes the separation between the two stars. The right panel shows the maximal amplitude of the periodic signal, Δ_m, as a function of the total mass of the binary system, M_⋆, tot, and the radius of the orbit, r_⋆. In this case, the orbital period is not fixed and is indicated by the black contours.