Figure 1. Radial profiles of age (left) and [α/M] (right) for RC stars at different heights from the midplane of the Milky Way in the APOGEE survey. The solid lines correspond to the median values in each bin, while the shaded areas represent the uncertainty on these medians (the range from the 16th to 84th percentiles, based on 1000 bootstrap samples). The top image is a DSS image of NGC 891 and illustrates the physical location of our different z slices. At all heights above the disk, we find a radial gradient of age and [α/M] .
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