VLT / UVES constraints on the cosmological variability of the fine-structure constant ⋆

Abstract

A differential many-multiplet (DMM) technique is developed to probe the variability of α. Applied to the Fe ii lines of the metal absorption line system at z abs = 1.839 in the spectrum of Q1101–264 obtained by means of the UV-Visual Echelle Spectrograph (UVES) at the ESO Very Large Telescope (VLT), the DMM provides ∆α/α = (2.4 ± 3.8stat) × 10 −6. The z abs… (More)

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