Closing in on the Primordial Abundance of Deuterium

Details Closing in on the Primordial Abundance of Deuterium Closing in on the Primordial Abundance of Deuterium

1997-12-18

arxiv.org/abs/astro-ph/9712265v2

Astronomy and Astrophysics

Astrophysics

11 pages, Kluwer Latex, 4 figures. To appear in the proceedings of the ISSI workshop, "Primordial Nuclei and their Galactic Ev

Scientific paper

We present our measurements of the deuterium to hydrogen ratio (D/H) in QSO absorption systems, which give D/H = 3.40 $\pm 0.25 \times 10^{-5}$ based on analysis of four independent systems. We discuss the properties of two systems which provide the strongest constraints on D/H. We outline the systematic effects involved in measurements of D/H and introduce a sophisticated method of analysis which properly accounts for these effects.

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