A systematic study of NLTE abundances of nearby stars

摘要

Approximately 80 stars from the thin disk, the thick disk and the halo of the Galaxy, in the range of -3.0 < [Fe/H] < +0.5, surface gravity of'3.0 < logg < 4.7 and temperature of 4500K < Teff < 6500 K, have been observed with the Shane/Hamilton and CFHT/Espadons spectrographs in order to carry out a systematic NLTE study of nearby stars in a consistent way. We will determine reliably stellar parameters ánd determine precise elemental abundances via a comprehensive NLTE analysis of the spectral lines of Li, Na, Mg, Al, Si, K, Ca, Sc, Mn, Fe, Sr, Zr, Ba, Nd, and Eu elements. Finally, we aim to investigate the chemical evolution of the Galaxy through different stellar populations based on the NLTE abundances for total 15 elements.