57 citations · 145 across the 4 of their papers we have counts for
4 papers
Search for a drifting proton--electron mass ratio from H
Wim Ubachs, Julija Bagdonaite, Edcel J. Salumbides +2
An overview is presented of the H quasar absorption method to search for a possible variation of the proton--electron mass ratio on a cosmological time scale. Detai…
Constraint on a varying proton-to-electron mass ratio from molecular hydrogen absorption toward quasar SDSS J123714.60+064759.5
M. Daprà, J. Bagdonaite, M. T. Murphy +1
Molecular hydrogen transitions in the sub-damped Lyman alpha absorber at redshift z = 2.69, toward the background quasar SDSS J123714.60+064759.5, were analyzed in order to search…
A constraint on a varying proton--electron mass ratio 1.5 billion years after the Big Bang
J. Bagdonaite, W. Ubachs, M. T. Murphy +1
A molecular hydrogen absorber at a lookback time of 12.4 billion years, corresponding to 10 of the age of the universe today, is analyzed to put a constraint on a varying proto…
H Lyman and Werner band lines and their sensitivity for a variation of the proton-electron mass ratio in the gravitational potential of white dwarfs
E. J. Salumbides, J. Bagdonaite, H. Abgrall +2
Recently an accurate analysis of absorption spectra of molecular hydrogen, observed with the Cosmic Origins Spectrograph aboard the Hubble Space Telescope, in the photosphere of wh…