Computer Science
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982rspta.307...87s&link_type=abstract
(Royal Society, Discussion on the Big Bang and Element Creation, London, England, Mar. 11, 12, 1982.) Royal Society (London), Ph
Computer Science
4
Absorption Spectra, Intergalactic Media, Lyman Spectra, Mass Distribution, Molecular Clouds, Red Shift, Deuterium, Heavy Elements, Spectrum Analysis, Statistical Analysis
Scientific paper
Most of the sharp absorption lines in the spectra of quasars of high red-shift are single Lyman-alpha lines. The stronger ones have associated Lyman-beta or Lyman-gamma lines but not lines of heavy elements. Recent statistical studies have shown that the density of Lyman-alpha absorption lines is statistically the same in all quasars and that the lines are randomly distributed, with no tendency to cluster. It is now thought that the single Lyman-alpha absorption lines are produced by primordial, intergalactic clouds. Studies now in progress are aimed at giving limits on the heavy-element composition of the clouds, as well as a value for the deuterium abundance of primordial gas.
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