Fig. A.1
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Top panel: Comparison between the [Fe/H] measurements of Huang et al. (2022) and Huang et al. (2025). The red dots fulfil the τ < 1.5 condition. Bottom panel: Comparison between average [Fe/H] values from Huang et al. (2022) and Huang et al. (2025) fulfilling the τ < 1.5 condition vs the determinations of Das et al. (2025). The red solid dots again represent cases satisfying τ < 1.5.
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