Fig. 4.

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EWLyα distribution over the range of UV absolute magnitude probed for the LAE+LBG sample. The red stars indicate the average in five equal-size bins between M1500 = −20 and M1500 = −15, the region that is well populated. De Barros et al. (2017) provide a similar plot (at z = 6) for a brighter sample with a similar rising average EWLyα. Our plot extends several magnitudes fainter, and we see that this trend continues down to at least M1500 = −16. An idea of the region fainter than M1500 = −15 can be gained by including the LAE-only sample (orange triangles), the vast majority of which are very faint in UV magnitude, and high-EWLyα objects. For these objects, EW error bars, coming only from the error on the Lyman-α flux, are smaller than the size of the points. The continuum values used are 2σ upper limits estimated from the filter that would see the emission at 1500 Å rest frame.
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