Publication
Title
The enrichment history of cosmic metals
Author
Abstract
We use a suite of cosmological, hydrodynamical simulations to investigate the chemical enrichment history of the Universe. Specifically, we trace the origin of the metals back in time to investigate when various gas phases were enriched and by what halo masses. We find that the age of the metals decreases strongly with the density of the gas in which they end up. At least half of the metals that reside in the diffuse intergalactic medium (IGM) at z= 0 (z= 2) were ejected from galaxies above z= 2 (z= 3). The mass of the haloes that last contained the metals increases rapidly with the gas density. More than half of the mass in intergalactic metals was ejected by haloes with total masses less than 1011 M⊙ and stellar masses less than 109 M⊙. The range of halo masses that contribute to the enrichment is wider for the hotter part of the IGM. By combining the when and by what aspects of the enrichment history, we show that metals residing in the lower density gas were typically ejected earlier and by lower mass haloes.
Language
English
Source (journal)
Monthly notices of the Royal Astronomical Society. - Oxford
Publication
Oxford : 2010
ISSN
0035-8711
Volume/pages
409:1(2010), p. 132-144
ISI
000284285500014
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 07.04.2011
Last edited 20.09.2017
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