On the Measurements of D/H in QSO Absorption Systems Closing in on the primordial abundance of deuterium |
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| Authors: | Burles S Tytler D |
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| Institution: | (1) Department of Astronomy & Astrophysics, University of Chicago, 5640 S. Ellis Ave, Chicago, IL, 60637;(2) Center for Astronomy and Astrophysics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0424 |
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| Abstract: | We present our measurements of the deuterium to hydrogen ratio (D/H) in QSO absorption systems, which give D/H = 3.40 ± 0.25 × 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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| Keywords: | Cosmology nucleosynthesis abundances Quasars: absorption lines |
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