Radial evolution of the Lyα peak velocity with respect to the Lyα line of the central LAE. The open circles and squares show the Lyα peak velocity shift in the mean and median stacks (Figure 2). The small symbols connected by dotted lines show the same results extracted with smaller radial bins. The grey horizontal shadow shows the median systemic redshift of the central LAE, as is shown in Figure 3, based on the empirical relations established by Verhamme et al. (2018). The orange and maroon vertical shadows show the maximum radii of the LAHs from previous MUSE (Leclercq et al. 2020; Claeyssens et al. 2019) and KCWI (Erb et al. 2018, 2023) analysis.