The DESIRED strong-line calibrations: I. New empirical metallicity relations for the local and high-redshift universe
This research presents comprehensive empirical strong-line metallicity calibrations using 2392 spectra from the DESIRED database, covering local and high-redshift galaxies. By testing both uniform and temperature-inhomogeneous gas models, the study provides robust relations for oxygen, nitrogen, sulphur, argon, and neon lines. The key finding is that sample diversity is more important than redshift-specific recalibration for reliable abundance estimates across cosmic time.