Fig. 9.
Top: the evolution of Hi-z LBGs in the IRX vs.β diagram is an evolutionary sequence, with younger galaxies being bluer and older galaxies redder. The continuous line is the Calzetti dust attenuation law, and the dotted line is the SMC one. The trend observed here explains the location of galaxies not detected by Capak et al. (2015). Bottom: the same objects are colour-coded with sMdust. Hi-z LBGs with low dust masses are found below Calzetti and SMC dust attenuation laws.
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