Extended Data Fig. 7: Field A overdensity at z=2.23.
From: Extensive diffuse Lyman-α emission correlated with cosmic structure

Mosaic of 16 3Å slices covering the z ~ 2.23 overdensity. Each central wavelength and corresponding Lyα redshift is shown, and galaxies are displayed for which Lyα falls within 10Å of the slice. Most of the galaxies are embedded in emission at a corresponding redshift, and the majority have emission spanning multiple galaxies at a given redshift.