Fig. 5.
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Cartoon representation of apex accretor and sub-units undergoing accretion. The color (metal abundance) of the sub-units varies with size (halo mass), with the smaller being redder (metal richer) and the larger bluer (metal poorer). Note: the apex accretor features a color (metal abundance) that is a “mean” of the sub-units’ colors (metal abundances).
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