Fig. 9.
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Comparison between radial oxygen abundance distributions in NGC 3521 and the Milky Way. The plus signs denote the abundances in the H II regions of the Milky Way, and the dashed line is the O/H–R relation adopted for the Milky Way. The circles mark the binned abundances in NGC 3521 (from panel (a) of Fig. 4). The solid line shows the O/H–R relation adopted for NGC 3521, Eq. (1).
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