The source of metals in the high-redshift Lyman-α forest

Details The source of metals in the high-redshift Lyman-α forest The source of metals in the high-redshift Lyman-α forest

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006rmxac..26..117l&link_type=abstract

XI IAU Regional Latin American Meeting of Astronomy (Eds. L. Infante & M. Rubio) Revista Mexicana de Astronomía y Astrofísica (S

Astronomy and Astrophysics

Astronomy

Intergalactic Medium, Quasars: Absorption Lines

Scientific paper

The Lyα forest frequently exhibits associated metal absorption lines, but the source of metal enrichment is not fully understood yet. We present unique high-resolution spectra of gravitationally-lensed background quasars that has allowed us to study the kpc-scale structure of this highly ionized gas. The sizes of the absorbers derived from our data constrain both the ionization conditions and the CNO relative abundances at z ˜ 2. These indicate that the gas has been processed in galaxies and recently before the absorption occured, rather than in a very early epoch (z > 6) by Population III stars.

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