Speaker
Description
The derivation of elemental abundances for the stars belonging to the Ariel mission candidate sample is an ongoing task under the responsibility of the Stellar Characterisation Working Group. In da Silva et al. (2024), we published the first results regarding the abundances of carbon, nitrogen, and oxygen for a subsample of 181 FGK dwarf stars with stellar parameters (effective temperature, surface gravity, microturbulent velocity, and metallicity) derived by Magrini et al. (2022). More recently, the stellar parameters have been revised, and a subsample of fast rotators (Tsantaki et al. 2025) and hot stars (Ramler et al. 2026) have been included. Here we show the preliminary results in which the CNO abundances are revised using updated stellar parameters, where available, together with more recent atomic and molecular data. Moreover, additional high-resolution spectra, either from public archives or from recently acquired observations, are being continuously included in our study. By enlarging the sample for which we perform an homogeneous determination of the stellar parameters and abundances, based on the newest available data, we aim at improving the already known key relations between planetary and stellar parameters and, in addition, exploring possible hidden connections involving planetary systems.