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Fig. 3

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Mahalanobis distance distribution for the Roslund 6 members selected by the HDBSCAN algorithm. The horizontal dashed black line is the outlier threshold with a value of c = 3.33. There are 57 stars identified as outliers in this open cluster, indicated by triangles above the dashed line. The horizontal axis represents an arbitrary star index assigned by HDBSCAN to the selected members.

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