Photometric period versus the absolute Wesenheit magnitude, W_BP, RP − μ, for the long-period binary candidates. The color code corresponds to the ratio between the period derived based on the RV curve and the photometric period. Stars having binary solutions in the Gaia NSS catalog are marked with empty squares. Two sequences are recovered: a sequence composed of brighter stars with P_VR/P_ph ≃ 2, and a tidally locked population having lower luminosities and shorter periods.