Top: raw distributions of MV and (V − I) of all Hipparcos stars within 50 pc (6911 objects). The dashed lines show the numbers of stars within the completion volume corresponding to their magnitude (see text). Middle: local debiased volumic density of stars (per magnitude unit, in pc-3) estimated from the ratio of stars within the completion volume and extrapolated beyond MV = 6. Bottom: debiased MV vs. V − I stellar density of stars closer than 50 pc.
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