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Fig. 16.

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Distribution of the radial component of the relative proper motions for the stars within the 18′ radius from the centre of NGC 2244 (shown as a KDE plot). The grey dashed line indicates the zero velocity, the solid orange line the median of the distribution, and the shaded orange region indicates the 3σ uncertainty on the median. The values on the top axis assume a distance of 1500 pc.

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