Fig. 13
Age-metallicity relation for SMC clusters. The upper panel shows the literature average, as in Fig. 10. The lower panel shows the WH clusters from the literature, Paper I, and this work. In both panels we overplot the burst chemical evolution model of Pagel & Tautvaisiene (1998) and the merger models of Tsujimoto & Bekki (2009), which correspond to no-merger and merger of progenitors with mass ratios of 1−1 and 1−4.
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