Representative examples of the Hα spectra. Each row shows objects drawn from each quartile of Hα flux: the top row contains galaxies drawn from the highest quartile in flux, the second row from the second‐highest quartile, the third row from the third‐highest quartile, and the bottom row from the lowest quartile. The dotted lines in each panel show, from left to right, the locations of [N II] λ6548, Hα, [N II] λ6583, [S II] λ6716, and [S II] λ6732.