Left: mean values for oxygen abundance from the central spaxel (value at 0 arcsec) to the total spectra (value at 39 arcsec), increasing the aperture in steps of 3 arcsec. Error bands are errors of the mean values. The upper x-axis shows where the aperture with 3′′ diameter is projected for different redshifts. Right: same measurements, but normalizing the unit of the aperture to the effective radius of the galaxies.
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