827 citations · 9.1k across the 78 of their papers we have counts for
9 papers · 1 filter
Further Evidence for Cosmological Evolution of the Fine Structure Constant
J. K. Webb, M. T. Murphy, V. V. Flambaum +5
We describe the results of a search for time variability of the fine structure constant, alpha, using absorption systems in the spectra of distant quasars. Three large optical data…
Possible evidence for a variable fine structure constant from QSO absorption lines: motivations, analysis and results
M. T. Murphy, J. K. Webb, V. V. Flambaum +5
An experimental search for variation in the fundamental coupling constants is strongly motivated by modern high-energy physics theories. Comparison of quasar absorption line spectr…
The Deuterium to Hydrogen Abundance Ratio Towards a Fourth QSO: HS0105+1619
John M. O'Meara, David Tytler, David Kirkman +4
We report the measurement of the primordial D/H abundance ratio towards QSO \object. The column density of the hydrogen in the Lyman limit system is high, \lnhi $=…
Probing High-Redshift Disks with Damped Lyman Alpha Systems
Arthur M. Wolfe
Evidence is presented that the damped Lyman alpha absorption systems are the high-redshift (z > 3) progenitors of galaxy disks. I discuss kinematic evidence that the damped Lyman A…
Ionized Gas in Damped Lyman Alpha Protogalaxies: II. Comparison Between Models and the Kinematic Data
Arthur M. Wolfe, Jason X. Prochaska
We test semi-analytic models for galaxy formation with accurate kinematic data of damped Lyman alpha protogalaxies (DLAs) presented in the companion paper I. The models envisage ce…
Ionized Gas in Damped Lyman Alpha Protogalaxies: I. Model-Independent Inferences From Kinematic Data
Arthur M. Wolfe, Jason X. Prochaska
We investigate the kinematics of ionized and neutral gas in a sample of 35 damped Lyman alpha protogalaxies (DLAs) with HIRES on the Keck I 10 m telescope. Velocity profiles with r…