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astro-ph1997
Closing in on the Primordial Abundance of Deuterium
Scott Burles, David Tytler
We present our measurements of the deuterium to hydrogen ratio (D/H) in QSO absorption systems, which give D/H = 3.40 based on analysis of four independen…
astro-ph1997
Cosmology with the Very Large Telescope Interferometer using a space based astrometric reference frame
David Tytler
Cosmology with large interferometric telescopes is a rich and largely unexplored subject, involving three types of measurement: astrometric measurement of absolute distances and pr…