Fig. 2
Redshift-corrected SDSS spectra in the wavelength range λλ2750–2850 Å of all selected galaxies excluding J0207+0047, which is shown in Fig. 1. Vertical dotted lines indicate the nominal wavelengths of the Mg iiλ2797, λ2803 emission lines. For three galaxies, J0812+3200, J1045+3225, and J1716+2744, two spectra are shown that are available in the SDSS database.
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