Metal-line system survey: characterizing the low-redshift IGM

Details Metal-line system survey: characterizing the low-redshift IGM Metal-line system survey: characterizing the low-redshift IGM

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ap%26ss.320...31c&link_type=abstract

Astrophysics and Space Science, Volume 320, Issue 1-3, pp. 31-34

Astronomy and Astrophysics

Astrophysics

Galaxies: Quasars: Absorption Lines, Quasars: Individual (Pks1302-102)

Scientific paper

The low-redshift IGM probes the last ten billion years of metal enrichment from galactic feedback processes. We present preliminary results from a survey of intergalactic metal-line absorption systems in archival HST STIS, GHRS, and FUSE spectra of ≈50 z≲2 UV-bright objects. We summarize the detailed analysis of one sightline (PKS1302-102, z QSO =0.2784) with which we set the methodology for the larger survey. We use simple CLOUDY models to constrain the ionizing mechanism(s) and metallicities for the metal-line systems. For about 15 sightlines, including PKS1302-102, we have a complementary galaxy survey, and we look for correlations between galaxies and absorption systems in order to understand the large-scale distribution of the metal-enriched IGM.

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