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Journal of Cosmology and Astroparticle Physics

Cosmological evolution of alpha driven by a general coupling with quintessence

Author

Valerio Marra and Francesca Rosati

Affiliations

Dipartimento di Fisica 'Galileo Galilei' and INFN, Università di Padova, via Marzolo 8, I-35126 Padova, Italy

E-mail

valerio.marra@pd.infn.it francesca.rosati@pd.infn.it

Journal

Journal of Cosmology and Astroparticle Physics Create an alert RSS this journal

Issue

Volume 2005, May 2005

Citation

Valerio Marra and Francesca Rosati JCAP05(2005)011

doi: 10.1088/1475-7516/2005/05/011


Article References Cited By
 
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Abstract

A general model for the cosmological evolution of the fine structure constant α driven by a typical quintessence scenario is presented. We consider a coupling between the quintessence scalar phi and the electromagnetic kinetic term FμνFμν, given by a general function BF(phi). We study the dependence of the cosmological Δα(t) upon the functional form of BF(phi) and discuss the constraints imposed by the data. We find that different cosmological histories for Δα(t) are possible within the available constraints. We also find that quasar absorption spectra evidence for a time variation of α, if confirmed, is not incompatible with Oklo and meteorite limits.

 
Keywords

cosmology of theories beyond the SM

dark energy theory

 

E-print Number: astro-ph/0501515

Cited: by |

Refers: to

PACS

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

Subjects

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 05 (May 2005)

Received 24 January 2005 , accepted for publication 10 May 2005

Published 19 May 2005



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