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

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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.
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

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/6953

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/0311126
 http://arxiv.org/abs/astro-ph/0311126

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arXiv