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Fig. A.2

Fig. A.2 Refer to the following caption and surrounding text.

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Number density for the high-α (top), bridge (middle) and low-α (bottom) discs. The 2D histograms in each row are scaled by the largest amplitude among the six subplots in that row. In this way, the galactocentric distances at which each disc component is most prominent can be seen.

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