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.
@article{arxiv.astro-ph/0311126,
title = {FeII/MgII, [Fe/Mg] Ratios and High-z Quasars},
author = {Kirk Korista and Nalaka Kodituwakku and Michael Corbin and Wolfram Freudling},
journal= {arXiv preprint arXiv:astro-ph/0311126},
year = {2007}
}
Comments
To appear in the proceedings of "AGN Physics with the SDSS", eds. G. T. Richards and P. B. Hall (San Francisco: ASP) (2004), 4 pages including 2 figures, newpasp.sty