ar X iv : a st ro - p h / 06 12 40 7 v 1 1 4 D ec 2 00 6 Revision of VLT / UVES constraints on a varying fine - structure constant
نویسندگان
چکیده
The two statistical studies of spectra from multiple heavy element transitions in quasar absorption systems report conflicting results on a varying fine-structure constant, α. Re-analysis of Srianand et al. [Phys. Rev. Lett. 92, 121302 (2004)] reveals flawed parameter estimation methods. These caused errors to be underestimated by a factor of ∼ 3 and may contribute to an existing strong bias in ∆α/α towards zero. Their spectra and absorption profile models actually imply a larger error and smaller α than their reported ∆α/α = (−0.06±0.06)×10 . Our revised value is (−0.44±0.16)×10 but we note that the published models may require detailed revision to derive a reliable measurement.
منابع مشابه
ar X iv : a st ro - p h / 06 11 08 0 v 2 7 N ov 2 00 6 Revisiting VLT / UVES constraints on a varying fine - structure constant
Current analyses of VLT/UVES quasar spectra disagree with the Keck/HIRES evidence for a varying fine-structure constant, α. To investigate this we introduce a simple method for calculating the minimum possible uncertainty on ∆α/α for a given quasar absorber. For many absorbers in Chand et al. (2004) and for the single-absorber constraint of Levshakov et al. (2006) the quoted uncertainties are s...
متن کاملar X iv : a st ro - p h / 06 11 08 0 v 1 2 N ov 2 00 6 Revisiting VLT / UVES constraints on a varying fine - structure constant
Current analyses of VLT/UVES quasar spectra disagree with the Keck/HIRES evidence for a varying fine-structure constant, α. To investigate this we introduce a simple method for calculating the minimum possible uncertainty on ∆α/α for a given quasar absorber. For many absorbers in Chand et al. (2004) and for the single-absorber constraint of Levshakov et al. (2006) the quoted uncertainties are s...
متن کاملar X iv : a st ro - p h / 06 11 08 0 v 3 10 N ov 2 00 6 Revisiting VLT / UVES constraints on a varying fine - structure constant
Current analyses of VLT/UVES quasar spectra disagree with the Keck/HIRES evidence for a varying fine-structure constant, α. To investigate this we introduce a simple method for calculating the minimum possible uncertainty on ∆α/α for a given quasar absorber. For many absorbers in Chand et al. (2004) and for the single-absorber constraint of Levshakov et al. (2006) the quoted uncertainties are s...
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تاریخ انتشار 2006