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

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

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..217..202v&link_type=abstract

International Astronomical Union Symposium no. 217, held 14-17 July, 2003 in Sydney, Australia. Edited by P.-A. Duc, J. Braine

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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.

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