Predicted over observed ratio for LIR for all the galaxies modeled and for the different stellar population scenarios we have explored (dashed symbols stand for declining SFH models including nebular emission, solid lines neglecting this effect, dot-dashed cyan and magenta consider rising SFH scenarios including nebular emission). We can see that the SMC-based predictions underpredict LIR in almost all cases. The Calzetti-based models, although more degenerate, achieve a match with most of the objects’ observed LIRwithin the 68% confidence range. The rising SFH models predict globally at least as much or more LIR than their corresponding (in terms of extinction law) declining SFH ones (as shown in Schaerer et al. 2013), pushing in particular the Calzetti-based models to overpredict the observed quantities. The effect is similar but smaller for the SMC-based solutions, and allows a perfect match in the case of C0. We note that for MACS0451N the observed LIR of the northern part, representing ~1/3 of the total, was adopted here and the predicted LIR compared here are also derived for this same region, for coherence. This means that, depending on the model, the predicted LIR used are ~35−40% of the values listed in Tables 4 and 5. If one plotted the same for the total arc in the eventuality of a negligible AGN contribution the ratios shown would be scaled down by ~0.15 dex at most.
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