A High Deuterium Abundance at z=0.7; Evidence for Cosmic Inhomogeneity?

Details A High Deuterium Abundance at z=0.7; Evidence for Cosmic Inhomogeneity? A High Deuterium Abundance at z=0.7; Evidence for Cosmic Inhomogeneity?

1997-10-09

arxiv.org/abs/astro-ph/9710089v1

Astronomy and Astrophysics

Astrophysics

Latex/conf_iap.sty/10pt.sty, 6 pages, 2 figs. To appear in Proc. of the 13th IAP Colloquium: Structure and Evolution of the IG

Scientific paper

Recent HST/GHRS observations of the z = 0.7010 absorber toward the QSO 1718+4807 (selected because of apparently ideal characteristics for measuring D/H) yield a D/H significantly higher D/H than some recent high-redshift measurements. Our analysis indicates D/H}= 1.8 - 2.5 x 10^{-4}. This may indicate a cosmological inhomogeneity in the deuterium abundance of at least a factor of ten.

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