Uncertainties in the Determination of Primordial D/H

Details Uncertainties in the Determination of Primordial D/H Uncertainties in the Determination of Primordial D/H

1997-09-30

arxiv.org/abs/astro-ph/9709293v1

``Structure and Evolution of the Intergalactic Medium from QSO Absorption Line Systems'' eds. P. Petitjean and S. Charlot (Edi

Astronomy and Astrophysics

Astrophysics

8 pages LaTeX (aaspp4) with 3 encapsulated postscript figures. Also available at http://www.ifa.hawaii.edu/faculty/acowie/iap.

Scientific paper

The current status of high redshift D/H measurements is discussed. I first examine whether the observations of HS1937-1009 require a low value of D/H. It is shown that the LRIS measurements of the continuum break and the high resolution Lyman series data can easily be modelled with D/H in the range 5 x 10^(-5) to 10^(-4). I then discuss measurements on weaker Lyman limit systems. A statistical treatment of 10 partial Lyman limit systems favors D/H between 5 x 10^(-5) and 2 x 10^(-4).

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