activity
19992026
most citedFurther evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra

515 citations · 2k across the 25 of their papers we have counts for

collaborators

23 papers

astro-ph.SR2026

Wide binaries without viable bound Newtonian orbits

L. Pasquini, R. Saglia, F. Patat +7

Context. Wide binaries offer a unique opportunity to test gravity in the low acceleration regime, where deviations from Newtonian dynamics may appear. Aims. We use high-resolution…

astro-ph.CO2011★ 24 cited

On the absence of molecular absorption in high redshift millimetre-band searches

S. J. Curran, M. T. Whiting, F. Combes +6

We have undertaken a search for millimetre-wave band absorption (through the CO and HCO+ rotational transitions) in the host galaxies of reddened radio sources (z = 0.405-1.802). D…

astro-ph.CO2010★ 36 cited

Redshifted HI and OH absorption in radio galaxies and quasars

S. J. Curran, M. T. Whiting, M. T. Murphy +6

From a survey for redshifted HI 21-cm and OH 18-cm absorption in the hosts of a sample of radio galaxies and quasars, we detect HI in three of the ten and OH in none of the fourtee…

astro-ph2008★ 68 cited

A survey for redshifted molecular and atomic absorption lines - II. Associated HI, OH and millimetre lines in the z >~ 3 Parkes quarter-Jansky flat-spectrum sample

S. J. Curran, M. T. Whiting, T. Wiklind +3

We present the results of a z>2.9 survey for HI 21-cm and molecular absorption in the hosts of radio quasars using the GMRT and the Tidbinbilla 70-m telescope. Previously published…

astro-ph2007★ 92 cited

Comment on "Limits on the Time Variation of the Electromagnetic Fine-Structure Constant in the Low Energy Limit from Absorption Lines in the Spectra of Distant Quasars"

Michael T. Murphy, John K. Webb, Victor V. Flambaum

In their Letter [Phys. Rev. Lett. 92, 121302 (2004)] (also [Astron. Astrophys. 417, 853 (2004)]), Srianand et al. analysed optical spectra of heavy-element species in 23 absorption…

astro-ph2006★ 7 cited

Revisiting VLT/UVES constraints on a varying fine-structure constant

M. T. Murphy, J. K. Webb, V. V. Flambaum

Current analyses of VLT/UVES quasar spectra disagree with the Keck/HIRES evidence for a varying fine-structure constant, alpha. To investigate this we introduce a simple method for…