Fig. 3.

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Impact of dust attenuation on the UVJ colors of TNG100 galaxies. The blue contours show dust-free fluxes, while the red contours incorporate dust attenuation from unresolved dust (using the TODDLERS templates for star-forming regions) and resolved dust (adopting a dust-to-metal ratio of 50% in the ISM). The arrow in the first panel indicates the reddening in V − J and U − V according to the THEMIS dust model with an extinction in the V-band of one magnitude. Dust reddening is overly effective at low stellar masses while for massive star-forming galaxies the reddening in V − J is insufficient to reproduce the observations.
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