Abstract

In this talk, I present a reanalysis of the abundance gradients of C, N, O, Ne, S, Cl, and Ar for a sample of 33 Galactic H II regions using intermediate and high-resolution spectroscopy. New values of the Galactocentric distances were calculated using Gaia DR2 data for some objects, covering a range from 5-17 kpc. The electron temperature is measured in all the objects allowing a precise determination of the ionic abundance of each element. We study in detail the different ICF schemes to improve the results of the total abundances in Galactic H II regions. Our results for N and O gradients show a good agreement with previous determinations. For oxygen, we discard a flattening in the inner Galactic disc. The results for the gradients of Ne, S, Cl, and Ar show consistent results within the uncertainties with dispersions around the slope lower 0.11 dex in most of the cases. For C, we estimate a slope flatter than previous works. The radial distribution of Ne/O, Cl/O, and N/O is almost flat, implying a well-mixed of these elements across the disc of our Galaxy. Our results are also consistent with those from B type stars and cepheids, young planetary nebulae, and those slopes using optical and infrared data for H II regions.