Fig. 1
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Left panel: [Al/Fe] versus [M/H] for the whole APOGEE dataset, inclusive of disc (blue contours). Pop 1 and Pop 2 from this work are highlighted in green and orange and individual stars in globular clusters are represented as light blue and yellow stars for the two populations respectively. Right panel: energy versus angular momentum for the APOGEE halo (blue contours). Pop 1 and Pop 2 from this work are highlighted in green and orange and individual stars in globular clusters are represented as light blue and yellow stars for the two populations respectively.
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