92 citations · 164 across the 3 of their papers we have counts for
4 papers · 1 filter
Constraining Variations in the Fine-structure Constant, Quark Masses and the Strong Interaction
M. T. Murphy, V. V. Flambaum, J. K. Webb +3
We present evidence for variations in the fine-structure constant from Keck/HIRES spectra of 143 quasar absorption systems over the redshift range 0.2 < z_abs < 4.2. This includes…
H_2-bearing damped Lyman-alpha systems as tracers of cosmological chemical evolution
M. T. Murphy, S. J. Curran, J. K. Webb
The chemical abundances in damped Lyman-alpha systems (DLAs) show more than 2 orders of magnitude variation at a given epoch, possibly because DLAs arise in a wide variety of host…
Further evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra
M. T. Murphy, J. K. Webb, V. V. Flambaum
[Abridged] We previously presented evidence for a varying fine-structure constant, alpha, in two independent samples of Keck/HIRES QSO spectra. Here we present a detailed many-mult…
A search for high redshift molecular absorption lines toward millimetre-loud, optically faint quasars
M. T. Murphy, S. J. Curran, J. K. Webb
We describe initial results of a search for redshifted molecular absorption toward four millimetre-loud, optically faint quasars. A wide frequency bandwidth of up to 23 GHz per qua…