Bounds on the fine structure constant variability from Fe II absorption lines in QSO spectra

The Single Ion Differential a Measurement (SIDAM) method for measuring. Aalce and its figures of merit are illustrated together with the results produced by means of Fe II absorption lines of QSO intervening systems. The method provides, Deltaalpha/alpha = -0.12 +/- 1.79 ppm (parts-per-million) at z...

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Bibliographic Details
Published in:The European physical journal. ST, Special topics Special topics, 2008-10, Vol.163, p.173-189
Main Authors: Molaro, P, Reimers, D, Agafonova, I, Levshakov, S A
Format: Article
Language:English
Online Access:Get full text
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Summary:The Single Ion Differential a Measurement (SIDAM) method for measuring. Aalce and its figures of merit are illustrated together with the results produced by means of Fe II absorption lines of QSO intervening systems. The method provides, Deltaalpha/alpha = -0.12 +/- 1.79 ppm (parts-per-million) at zabs = 1.15 towards HE 0515-4414 and Deltaalpha/alpha = 5.66 +/- 2.67ppm at zabs = 1.84 towards Q 1101-264, which are so far the most accurate measurements for single systems.
ISSN:1951-6355
1951-6401
DOI:10.1140/epjst/e2008-00818-4