Deep SDSS optical spectroscopy of distant halo stars. III. Chemical analysis of extremely metal-poor stars
Aims: We present the results of an analysis of 107 extremely metal-poor (EMP) stars with metallicities lower than [Fe/H] =- 3.0, identified in medium-resolution spectra in the Sloan Digital Sky Survey (SDSS). Our analysis provides estimates of the stellar effective temperatures and surface gravities, as well as iron, calcium, and magnesium
Schneider, D. P. et al.
Fecha de publicación:
9
2016