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Fig. D.1

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He I λ10830 Å profiles of the Upper Scorpius sample, grouped by profile type. The profiles are normalised to the continuum level and rescaled between ± 1 for plotting. The black vertical dashes (at −88 km s−1 and +126 km s−1) mark photospheric absorption features (i.e Si I 10830.1 Å and NaI 10837.8 Å)
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