Positions of the stars of our sample within 50 pc in the [M_V, V − K] color-magnitude diagram. The stars exhibiting a PMa signal-to-noise ratio Δ_G2 >  2 are represented in colors. The symbol size correspond to the normalized companion masse following the scale displayed in the lower left corner), and the primary mass m₁ is represented in color using the scale represented in the upper right corner. The stars with a PMa signal-to-noise ratio Δ_G2 ≤ 2 are represented using light gray dots, and the objects discussed individually in Sect. 5 are indicated with “+” symbols. To guide the eye, the main sequence from Pecaut & Mamajek (2013) is represented by a dashed pink curve.