Heavy element absorption line systems - Cosmological evolution?

Details Heavy element absorption line systems - Cosmological evolution? Heavy element absorption line systems - Cosmological evolution?

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983liaco..24..589b&link_type=abstract

IN: Quasars and gravitational lenses; Proceedings of the Twenty-fourth Liege International Astrophysical Colloquium, Cointe-Ougr

Mathematics

Logic

5

Absorption Spectra, Abundance, Big Bang Cosmology, Heavy Elements, Interstellar Matter, Quasars, Absorption Cross Sections, Red Shift, Spectral Line Width, Statistical Analysis

Scientific paper

From statistical studies of quasar samples it is well known that the cross-section of the sharp absorption line systems is much larger when derived from C IV than from Mg II. This effect does not result from an evolution of the cross-section of the C IV absorbers. Indeed using a well defined sample the auhors derive this cross-section in the redshift range 1.3 - 2.3 and do not find any convincing evidence for a cosmological evolution. The authors also discover striking differences between the distribution of the rest equivalent width of the C IV and Mg II absorption lines.

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