Chemical evolution of the Universe at 0.7 < z < 1.6 derived from abundance diagnostics of the broad-line region of quasars

Hiroaki Sameshima, Yuzuru Yoshii, Kimiaki Kawara

We present an analysis of Mg II $\lambda 2798$ and Fe II UV emission lines for archival Sloan Digital Sky Survey (SDSS) quasars to explore diagnostics of the magnesium-to-iron abund…