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New Keck Spectra of Q0014+813: annulling the case for high deuterium abundances
David Tytler, Scott Burles, David Kirkman
The spectrum of quasar 0014+813 was the first in which deuterium was claimed to be observed, at first as a probable detection, and later ``confirmed''. It is important because it i…
Redshifts of galaxies close to bright QSO lines of sight
David V. Bowen, Samantha J. Osmer, J. Chris Blades +1
To expand the known number of low-redshift galaxies which lie close to bright () QSO lines of sight, we have identified 24 galaxies within 11 arcmins of nine QSOs which h…
Cosmological Questions for the European Southern Observatory Very Large Telescope
David Tytler
The next decade promises an observational revolution which will change cosmology forever. The precise measurement of the angular anisotropy of the cosmic microwave background shoul…
The Cosmological Baryon Density from Deuterium in QSO Spectra
David Tytler, Scott Burles
The primordial D/H ratio now provides the best measure of the cosmological density of baryons. We describe in detail how we deduce the D/H ratio from absorption lines in the spectr…
Cosmological Deuterium Abundance and the Baryon Density of the Universe
Scott Burles, David Tytler
Standard big bang nucleosynthesis (BBNS) promises accurate predictions of the primordial abundances of deuterium, helium-3, helium-4 and lithium-7 as a function of a single paramet…
The Cosmological Baryon Density from the Deuterium Abundance at a redshift z = 3.57
David Tytler, Xiao-ming Fan, Scott Burles
We present a measurement of the deuterium to hydrogen ratio in a quasar absorption system at redshift z = 3.57 towards QSO 1937-1009. We use a two component fit, with redshifts det…