Combined spectra of [NeV] emitters with LR (panel a) and HR (panel b) from the green valley (green solid line) and the blue cloud (blue dotted line). Panel c: stacked spectrum of the HR blue [NeV] emitters (blue dotted line) overlapped to the combined spectrum of the blue galaxies (grey solid line) with equivalent distributions of stellar mass, redshift, and [OII] luminosity. Strong Balmer absorption lines (Hδ, Hϵ blended in CaII Hλ3968) are features observed in HR blue emitters only. Panel d: same as in panel c for the green galaxies and HR green [NeV] emitters. We have applied an offset to the spectra for clarity.
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