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Fig. 1.

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Coordinate positions of FLAMES targets are displayed by the red circles. The black cross denotes the cluster center () according to van Leeuwen et al. (2000). The dashed black circles show 2.5 and 5 times the core radius (; Harris 1996). We note that 424 out of the 439 stars that were analyzed in this study are contained within the green circle, which is 10 times the core radius.

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