Uncertainties in the Determination of Primordial D/H
Astrophysics
2007-05-23 v1
Abstract
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).
Cite
@article{arxiv.astro-ph/9709293,
title = {Uncertainties in the Determination of Primordial D/H},
author = {Antoinette Songaila},
journal= {arXiv preprint arXiv:astro-ph/9709293},
year = {2007}
}
Comments
8 pages LaTeX (aaspp4) with 3 encapsulated postscript figures. Also available at http://www.ifa.hawaii.edu/faculty/acowie/iap.html . To be published in Proceedings of the 13th IAP Colloquium: Structure and Evolution of the IGM from QSO Absorption Lines