Luminosity distance for Born-Infeld electromagnetic waves propagating in a cosmological magnetic background

AIELLO M., BENGOCHEA G. R., FERRARO R.

A Decade of Dark Energy: Spring Symposium, Proceedings of the conferences

Space Telescope Science Institute, edited by Norbert Pirzkal and Henry Ferguson

Lugar: Baltimore, Maryland, USA; Año: 2008 p. 1 - 1

The discovery of a diminution in the observed energy fluxes coming from supernovae type Ia has opened one of the most puzzling and deepest problems in cosmology today. Although the cosmological constant seems to be the simplest explanation for the phenomenon, several dynamical scenarios have been tried out. We have studied a speculative model by analyzing Born-Infeld electromagnetic waves interacting with a static magnetic background in an expanding universe. Here we show how the non-linear character of Born-Infeld electrodynamics modifies the relation between the energy flux and the distance to the source, which gains a new dependence on the redshift that is governed by the background field. We compute the luminosity distance as a function of the redshift and compare with the Maxwellian curves for supernovae type Ia.