IRX–Zg relation for star-forming main sequence galaxies extracted at z = 1.5. The gas-phase metallicity is computed as the oxygen over hydrogen abundance Zg = 12 + log(O/H). We focus on the dense/fragmented gas-phase metallicity. The blue density shows the complete star-forming galaxy sample. The solid gray line shows the median trend of this sample. The dashed gray lines indicate the 15% and 85% quantiles of the distribution. We compare the G.A.S. model with observational measurements coming from Pannella et al. (2015) and Cortese et al. (2006).
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