244 citations · 1.3k across the 18 of their papers we have counts for
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astro-ph.CO2025★ 2 cited
A sub-ppm upper limit on the cosmological variations of the fine structure constant alpha
S. Muller, A. Beelen, M. Guelin +9
Absorption spectroscopy toward high-redshift quasars provides strong constraints on the putative variation of fundamental constants of physics on cosmological time scales. The subm…
astro-ph.CO2012★ 44 cited
BR1202-0725: An Extreme Multiple Merger at z = 4.7
P. Salome, M. Guelin, D. Downes +5
The radio-quiet quasar BR1202-0725 (z=4.695) is a remarkable source with a bright Northwest (NW) companion detected at submm and radio wavelengths but invisible in the optical. In…