Metallicity distribution based on the 1845 giant stars in the b = −5° fields from the ARGOS survey (Ness et al. 2013a). The metallicity distribution is shown as both a regular histogram as well as a generalised histogram (assuming an uncertainty of 0.13 dex for all stars, Melissa Ness priv. comm.). The vertical blue lines indicate the locations of the Gaussian peaks (A to E) claimed by Ness et al. (2013a), and the vertical red dashed lines indicate the locations of the peaks in the MDF based on the microlensed dwarfs (Eqs. (1)–(5)).
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