Fig. 2
Upper panel: RVs vs. distance from the cluster centre. The core and tidal radii, from Salinas et al. (2012) are indicated. The filled red symbol is the high-Na star 2023 (see text). Lower panel: histogram of all RVs for the FLAMES spectra. The arrow indicates the average cluster RV at about 145.5 km s-1. The two vertical lines in both panels indicate ±3σ from the average.
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