Distribution of stellar masses derived by fitting spectrophotometric energy distributions of our galaxy sample. In this plot, we only show galaxies with β_FUV derived from CIGALE's fits. The range of stellar masses reaches M_star values as low as a few 10⁷ M_⊙. The colour-coding shows that the least massive galaxies clearly have bluer UV slopes (β_FUV≤−2.2), while the most massive galaxies have redder slopes (−1.5<β_FUV), as expected from the dependence of UV dust attenuation on stellar mass (see e.g. Bogdanoska & Burgarella 2020; Weibel et al. 2024; Bouwens et al. 2016). The vertical numbers show the mean stellar mass for each sample.