Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21334303c&link_type=abstract
American Astronomical Society, AAS Meeting #213, #343.03; Bulletin of the American Astronomical Society, Vol. 41, p.478
Mathematics
Logic
Scientific paper
The low-redshift IGM probes the last ten billion years of metal enrichment from galactic feedback processes. Outflows and mergers return to the IGM enriched material for future generations of galaxies and stars. The signature of this process is etched in the recycled gas: metallicity, abundances, density, distribution, etc. We have been characterizing two different stages of the cosmic enrichment cycle--the low-density IGM and the extended gaseous halos of galaxies. We present the frequency distribution f(N) of C IV absorbers at z < 1.5, from a survey of HST archival spectra of ˜50; quasars. We compare the observed f(N) with that predicted by cosmological hydrodynamic simulations with different feedback prescriptions. We also discuss early results from a survey of galaxies with halos probed by background quasars. We look for correlations between the galaxies and the halo absorbers that distinguish the feedback process(es) responsible for enriching the extended halos. This work is funded by the HST archival grant 10679 and the NSF CAREER grant AST 05_48180.
Chen How-Wei
Cooksey Kathy
Graves Genevieve
Prochaska Jason Xavier
Thom Chris
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