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28 March 2024
 
  » arxiv » astro-ph/9607098

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Testing cosmological variations of fundamental physical constants by analysis of quasar spectra
D.A. Varshalovich ; A.Y. Potekhin A.V. Ivanchik ; V.E. Panchuk ; K.M. Lanzetta ( Ioffe Phys.-Tech. Inst. ; St.-Petersburg ; 6-m Telescope Observatory ;
Date 19 Jul 1996
Subject astro-ph gr-qc
Affiliation Ioffe Phys.-Tech. Inst., St.-Petersburg, 6-m Telescope Observatory (SAO), Zelenchuk, Univ. of New York at Stony Brook
AbstractContemporary multidimensional cosmological theories predict different variations of fundamental physical constants in course of the cosmological evolution. On the basis of the QSO spectra analysis, we show that the fine-structure constant alpha=e^2/(hbar c) and the proton-to-electron mass ratio mu=m_p/m_e reveal no statistically significant variation over the last 90% of the lifetime of the Universe. At the 2sigma significance level, the following upper bounds are obtained for the epoch corresponding to the cosmological redshifts z ~ 3 (i.e., ~ 10 Gyr ago): |Deltaalpha/alpha| < 0.00016 and |Deltamu/mu| < 0.00022. The corresponding upper limits to the time-average rates of the constant variations are |dalpha/(alpha dt)| < 1.6 imes 10^{-14} yr^{-1} and |dmu/(mu dt)| < 2.2 imes10^{-14} yr^{-1}. These limits serve as criteria for selection of those theoretical models which predict alpha and mu variation with the cosmological time. In addition, we test a possible anisotropy of the high-redshift fine splitting over the celestial sphere, which might reveal a non-equality of alpha values in causally disconnected areas of the Universe.
Source arXiv, astro-ph/9607098
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