FeII/MgII, [Fe/Mg] Ratios and High-z Quasars

Details FeII/MgII, [Fe/Mg] Ratios and High-z Quasars FeII/MgII, [Fe/Mg] Ratios and High-z Quasars

2003-11-05

arxiv.org/abs/astro-ph/0311126v1

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of "AGN Physics with the SDSS", eds. G. T. Richards and P. B. Hall (San Francisco: ASP) (2004), 4

Scientific paper

It has been suggested in the literature that the (Fe/alpha) abundance ratio may be used as a chronometer, due to a delay in this ratio reaching its solar value as predicted by galactic chemical evolution models. Using grids of photoionization models along a sequence of the (Fe/Mg) abundance ratio vs.\ metallicity with time in a giant elliptical starburst scenario, we investigate the relationship between the (Fe/Mg) abundance ratio and the FeII/MgII emission line flux ratio under the assumption that these lines originate in photoionized clouds within the broad emission line regions of quasars.

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