488 citations · 1k across the 9 of their papers we have counts for
9 papers
A new analysis of fine-structure constant measurements and modelling errors from quasar absorption lines
Michael R. Wilczynska, John K. Webb, Julian A. King +3
We present an analysis of 23 absorption systems along the lines of sight towards 18 quasars in the redshift range of observed on the Very Large Telescop…
Searching for variations in the fine-structure constant and the proton-to-electron mass ratio using quasar absorption lines
Julian A. King
(abridged) Quasar absorption lines provide a precise test of the assumed constancy of the fundamental constants of physics. We have investigated potential changes in the fine-struc…
Spatial variation in the fine-structure constant -- new results from VLT/UVES
Julian A. King, John K. Webb, Michael T. Murphy +5
(abridged) We present a new analysis of a large sample of quasar absorption-line spectra obtained using UVES (the Ultraviolet and Visual Echelle Spectrograph) on the VLT (Very Larg…
New constraint on cosmological variation of the proton-to-electron mass ratio from Q0528-250
Julian A. King, Michael T. Murphy, Wim Ubachs +1
Molecular hydrogen transitions in quasar spectra can be used to constrain variation in the proton-to-electron mass ratio, , at high redshifts (). We pr…
Atomic transition frequencies, isotope shifts, and sensitivity to variation of the fine structure constant for studies of quasar absorption spectra
J. C. Berengut, V. A. Dzuba, V. V. Flambaum +4
Theories unifying gravity with other interactions suggest spatial and temporal variation of fundamental "constants" in the Universe. A change in the fine structure constant, alpha,…
Is there further evidence for spatial variation of fundamental constants?
J. C. Berengut, V. V. Flambaum, J. A. King +2
The detection of a spatial variation of the fine-structure constant, alpha, based on study of quasar absorption systems has recently been reported. The physics that causes this alp…