Velocity offset between Lyα central wavelength and systemic redshift versus stellar mass. The color coding is as in Fig. 9. Green squares are from Hashimoto et al. (2013) for the sample of z ~ 2.2 LAEs, also studied in Nakajima et al. (2012a). The stellar masses of our sources are estimates from stacked SED fitting as explained in Sect. 5.2.1.
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