UV continuum scale length (upper) and Lyα halo scale length (lower) as a function of absolute far-UV magnitude. Only the objects with a statistically significant Lyα halo are shown (see Sect. 5.1). Upper limits on the scale lengths and UV magnitudes are indicated by arrows. The W16 measurements are shown in black, Steidel et al. (2011) by green dots, Feldmeier et al. (2013) by magenta triangles, Momose et al. (2016) by orange stars, and X17 by red points (LAEs from a protocluster field “PCF”) and blue squares (LAEs around a Lyα blob “LAB”). Spearman rank correlation coefficients ρ_s and corresponding p₀ values for our results and those of W16 (without upper limits) are shown in each panel.