171 citations · 2.9k across the 75 of their papers we have counts for
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H/HD molecular data for analysis of quasar spectra in search of varying constants
W. Ubachs, E. J. Salumbides, M. T. Murphy +2
Absorption lines of H and HD molecules observed at high redshift in the line of sight towards quasars are a test ground to search for variation of the proton-to-electron mass r…
Search for varying constants of nature from astronomical observation of molecules
Wim Ubachs
The status of searches for possible variation in the constants of nature from astronomical observation of molecules is reviewed, focusing on the dimensionless constant representing…
Testing the variability of the proton-to-electron mass ratio from observations of methanol in the dark cloud core L1498
M. Daprà, C. Henkel, S. A. Levshakov +6
The dependence of the proton-to-electron mass ratio, mu, on the local matter density was investigated using methanol emission in the dense dark cloud core L1498. Towards two differ…
Analysis of carbon monoxied absorption at z=2.5 to constrain variation of the proton-to-electron mass ratio
M. Daprà, P. Noterdaeme, M. Vonk +2
Absorption by carbon monoxide in the spectrum of quasar SDSS J000015.16+004833.2 is investigated in order to derive a constraint on the temporal variation of the proton-to-electron…
Probing the Gravitational Dependence of the Fine-Structure Constant from Observations of White Dwarf Stars
Matthew B. Bainbridge, Martin A. Barstow, Nicole Reindl +12
Hot white dwarf stars are the ideal probe for a relationship between the fine-structure constant and strong gravitational fields, providing us with an opportunity for a direct obse…
Constraints on changes in the proton-electron mass ratio using methanol lines
N. Kanekar, W. Ubachs, K. M. Menten +6
We report Karl G. Jansky Very Large Array (VLA) absorption spectroscopy in four methanol (CHOH) lines in the gravitational lens towards PKS1830-211. Three of the…