EDP Sciences
Free access
Volume 487, Number 3, September I 2008
Page(s) 857 - 863
Section Cosmology (including clusters of galaxies)
DOI http://dx.doi.org/10.1051/0004-6361:20079125
Published online 01 July 2008

A&A 487, 857-863 (2008)
DOI: 10.1051/0004-6361:20079125

The time variation of the fine structure constant: a statistical analysis of astronomical data

S. J. Landau and C. Simeone

Departamento de Física, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria - Pab. 1, 1428 Buenos Aires, Argentina
    e-mail: [slandau;csimeone]@df.uba.ar

Received 22 November 2007 / Accepted 4 June 2008

Aims. We analyze different data of the variation of the fine structure constant obtained with different methods to check their consistency.
Methods. We test consistency using the modified student test and confidence intervals. We split the data sets into smaller intervals. A criterion for this selection is proposed.
Results. Results show consistency for reduced intervals for each pair of data sets considered.
Conclusions. Results are at variance with the ones obtained considering mean values over the whole interval.

Key words: quasars: absorption lines -- cosmology: observations -- cosmology: miscellaneous

© ESO 2008