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Fig. 1
Distribution of the difference ρ − vr between the astrometric and spectroscopic radial velocities for two samples of HIPPARCOS stars. Light blue: 926 stars with | ρ | < 2000 km s−1, σρ < 100 km s−1, and with radial velocities in SIMBAD. Dark blue: sub-sample of 852 stars that, in addition, have
. The bin size is 50 km s−1.
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