What obscures a galaxy?

Dust-obscured galaxies (DOGs) are the larger stellar nursery in the Universe and key objects to understand cosmic star formation history. We use a chemodynamical galaxy model and a dust production model to investigate the process that rules dust production in galaxies. We simulated forty galaxy models with initial baryonic mass $M_{\mathrm{G},0}$ from $7.5 \times 10^{7} \, \mathrm{M}_\odot$ to $2.0 \times 10^{12} \, \mathrm{M}_\odot$, varying star formation and dust production efficiency. We compared our results with observational data from low and high redshift. We find that dust production in high star formation systems is almost insensible to stellar dust production efficiency, since grain accretion in cold ISM rules dust accumulation in them. Dust accretion is also enough to explain reionization DOGs, even for low dust production efficiencies. We argue that a $M_\mathrm{Dust}/M_\mathrm{Gas}$--$M_\mathrm{Dust}/M_{*}$ diagram is a good tracer to investigate both galaxy evolution and dust production.