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The O3N2 and N2 abundance indicators revisited: improved calibrations based on CALIFA and<i>T</i><sub>e</sub>-based literature data
The use of integral field spectroscopy is since recently allowing to measure the emission line fluxes of an increasingly large number of star-forming galaxies, both locally and at high redshift. Many studies have used these fluxes to derive the gas-phase metallicity of the galaxies by applying the so-called strong-line methods. …