Fig. 2.

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Comparison of the Lyα halo surface brightness of GN-z11 to the profiles of Lyα halos around star-forming galaxies at z = 5.0–6.0 (red shaded region; Wisotzki et al. 2018) and quasars at z = 5.7–6.6 (yellow and orange shaded region; Farina et al. 2019). For the quasars from Farina et al. (2019) we show the radial surface brightness profiles for the full sample and for only those with detected Lyα halos as yellow and orange regions, respectively. We show two separate definitions of halo size for GN-z11: a smaller halo in the vicinity of the UV continuum (dark blue circle) and the full extent of the asymmetric halo (light blue square). The surface brightness and the extent of GN-z11’s Lyα halo are in agreement with quasars rather than star-forming galaxies at z ∼ 6.
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