The O/C abundance ratio in absorbing gas clouds at high redshift

Details The O/C abundance ratio in absorbing gas clouds at high redshift The O/C abundance ratio in absorbing gas clouds at high redshift

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.360..561r&link_type=abstract

Nature (ISSN 0028-0836), vol. 360, no. 6404, p. 561-563.

Physics

74

Abundance, Carbon, Intergalactic Media, Line Spectra, Oxygen, Quasars, Extreme Ultraviolet Radiation, Iue, Molecular Clouds

Scientific paper

Detailed ultraviolet spectroscopic measurements of the bright quasar HS1700 + 6416 obtained with the HST are reported. A rich absorption line spectrum is observed in which many EUV resonance lines are seen. The O/C abundance ratios inferred from the linestrengths are higher than solar system values by factors of three to five. This suggests that the absorbing material is halo gas of early galaxies, from which population II stars have yet to form, oxygen being a primary nucleosynthesis product from a first generation of massive stars.

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