Infrared–radio correlation, q_TIR, as a function of redshift for galaxies in the Delhaize et al. (2017) joint radio and infrared sample. We used the broken power-law SED from this paper for star-forming galaxies with an SFR >  10 M_⊙ yr⁻¹ and the following SED shapes for SFR <  10 M_⊙ yr⁻¹ (Tabatabaei et al. 2017): 1) a simple power-law SED with a spectral index of 0.79 (black line, K-correction 1) or a nonthermal spectral index of 0.97, and a 10% thermal fraction at 1 GHz (green line, K-correction 2). We show the Delhaize et al. (2017) relation for reference (magenta line).