Chemical composition of δ Scuti stars: 1. AO CVn, CP Boo, KW Aur

We used high-resolution echelle spectra acquired with the 1.5-m Russian-Turkish Telescope to determine the fundamental atmospheric parameters and abundances of 30 chemical elements for three δ Scuti stars: AOCVn, CP Boo, and KWAur. The chemical compositions we find for these stars are similar to those for Am-star atmospheres, though some anomalies of up to 0.6–0.7 dex are observed for light and heavy elements. We consider the effect of the adopted stellar parameters (effective temperature, log g , microturbulent velocity) and the amplitude of pulsational variations on the derived elemental abundances.