Evolution of the fine-structure constant in the non-linear regime

Details Evolution of the fine-structure constant in the non-linear regime Evolution of the fine-structure constant in the non-linear regime

2005-12-13

arxiv.org/abs/astro-ph/0512332v1

JCAP 0612:018,2006

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures

Scientific paper

10.1088/1475-7516/2006/12/018

We study the evolution of the fine-structure constant, $\alpha$, induced by non-linear density perturbations in the context of the simplest class of quintessence models with a non-minimal coupling to the electromagnetic field, in which the two available free functions (potential and gauge kinetic function) are Taylor-expanded up to linear order. We show that the results obtained using the spherical infall model for an infinite wavelength inhomogeneity are inconsistent with the results of a local linearized gravity study and we argue in favour of the second approach. We also discuss recent claims that the value of $\alpha$ inside virialised regions could be significantly different from the background one on the basis of these findings.

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