Relation between hot gas X-ray luminosity (0.5–2 keV) and the SFR for star-forming galaxies in the simulations. We only show galaxies with log(sSFR) >  − 11.6, which removes all galaxies that fulfill the Weinmann et al. (2010) criterion. This is done to reduce the influence of unresolved galaxies on the relation as well as remove weakly star-forming galaxies. The solid black line indicates the linear relation from Lehmer et al. (2022). The gray shaded area is the corresponding 1σ standard deviation. Data points are bolometric luminosities of the diffuse emission taken from S04 in the 0.3–2 keV band, M12a in the 0.5–2 keV band, and B13 in the 0.5–2 keV band.