Delving into the gas-phase of CALIFA galaxies to trace O and N gradients

CALIFA (Calar Alto Legacy Integral Field Area survey) has provided spatially resolved optical spectra of thousands of HII regions in spiral galaxies of the Local Universe whose properties can be linked with the integrated properties of the host galaxies. In this seminar, I will describe the results of a novel approach to analyse the radial profiles of the chemical abundances across galactic discs and their relation with total luminosity, stellar mass, star formation rate or morphology, focusing on the connotations of doing so separately for primary elements, such as oxygen, and secondary ones, such as nitrogen.