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Title:
Lack of Evolution in the Iron Abundance in Clusters of Galaxies and Implications for the Global Star Formation Rate at High Redshift
Authors:
Mushotzky, R. F.; Loewenstein, M.
Publication:
Astrophysical Journal Letters v.481, p.L63 (ApJL Homepage)
Publication Date:
06/1997
Origin:
APJ
ApJ Keywords:
GALAXIES: ABUNDANCES, GALAXIES: FORMATION, GALAXIES: INTERGALACTIC MEDIUM
DOI:
10.1086/310651
Bibliographic Code:
1997ApJ...481L..63M

Abstract

We present the first large sample of accurate iron abundances and temperatures for clusters at redshifts greater than 0.14. We find that the Fe abundance shows little or no evolution out to z ~ 0.3. This and the early formation epoch of elliptical galaxies in clusters indicate that most of the enrichment of the intracluster medium occurred at z > 1. If clusters represent fair samples of the universe, then global metal production is 2--5 times greater than is inferred from recent studies of galaxies at low and high redshifts.
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