Left: mean metallicity as a function of longitude for various cuts in latitude as indicated in the legend. Right: mean metallicity as a function of latitude for various cuts in longitude as indicated in the legend. The solid line corresponds to model M1 while the dashed line corresponds to model M2. The circles correspond to data from APOGEE. For the observations (models) only stars (particles) with distances between 4 and 12 kpc from the Sun are considered.
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