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Fe II Emission as a Probe of Iron Abundance at Low-z Quasars

Published online by Cambridge University Press:  26 May 2016

Ekaterina Verner
Ekaterina Verner*
Affiliation:
NASA/GSFC and CUA, USA

Abstract

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Whether the Fe/α enrichment is due to SN Ia explosions or massive objects is a key problem to be addressed in constructing our picture of galactic evolution in the Early Universe. Observations in the rest-frame of Mg II emission at 2800 Å and the broad emission complex of Fe II spanning 2000-3000 Å in high-z quasars should allow to determine the time in the Universe when increases in Fe abundance occur. This in turn provides us constraints on the stellar initial mass function and QSO formation and even the cosmological parameters. However a problem remains in developing a reliable model for this complex ion that accurately predicts the emission line spectra seen in luminous AGN at high redshift. The Fe II/Mg II emission ratios using new 830-level Fe II model are investigated with the intent to explain the observed Fe II/Mg II emission scatter.

Type
Part 2. Origin
Information
Symposium - International Astronomical Union , Volume 217: Recycling Intergalactic and Interslettar Matter , 2004 , pp. 202 - 203
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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