The metal-poor tail of the APOGEE survey - I. Uncovering [Fe/H] < –2.5 stars from the inner Galaxy to the Magellanic Clouds

Open Access

Fig. 1

Metallicity distribution functions for SAGA stars with literature [Fe/H] < −2.5. Top panel: uncalibrated metallicities from APOGEE. Bottom panel: calibrated APOGEE metallicities. The number of null values for each metallicity is shown with the same y-axis.

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