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Fig. 1.

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Selection of samples in the pseudo-Cartesian velocity plane, vs. . Black contours and points show the location of nearby halo stars identified in 6D (see text for details), and blue represents those of the disc(s). Helmi stream stars selected using 6D information are shown as green points (see text for details). The different 5D Helmi stream selections are shown as solid polygons in hues of green, whereas the ‘local retrograde halo’ and the ‘disc(s)-dominated’ subsets are given by the dashed black and cyan polygons.

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