The Lyman limit absorption system in the spectrum of PKS 2126-158 - Heavy-element abundance at high redshift

Details The Lyman limit absorption system in the spectrum of PKS 2126-158 - Heavy-element abundance at high redshift The Lyman limit absorption system in the spectrum of PKS 2126-158 - Heavy-element abundance at high redshift

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351..364s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 10, 1990, p. 364-376. Research supported by SERC.

Astronomy and Astrophysics

Astrophysics

18

Heavy Elements, Lyman Spectra, Quasars, Red Shift, Abundance, Cosmology, Galactic Structure

Scientific paper

The heavy element composition of a Lyman limit absorption system at z(abs) = 2.9676 in the spectrum of PKS 2126 - 158 is studied. Early observations had suggested that this absorption system had no detectable lines of heavy elements. However, new observations reveal weak associated lines due to C IV and C II. Photoionization models show that the system has a C/H abundance ratio = -2.3 + or - 0.2 and an Si/H abundance ratio less than -2.3. The possibility that the z(abs) = 2.9676 system in PKS 2126 - 158 is produced in galactic halo material or by primitive gas-rich dwarf galaxies is discussed.

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