Cosmological redshift and nonlinear electrodynamics propagation of photons from distant sources

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dc.creatorCuesta, Herman J. Mosquera
dc.creatorSalim, Jose M.
dc.creatorNovello, M.
dc.date2007-10-26
dc.date.accessioned2026-07-07T08:39:04Z
dc.date.available2026-07-07T08:39:04Z
dc.descriptionBy-now photons are the unique universal messengers. Cosmological sources like far-away galaxies or quasars are well-known light-emitters. Here we demonstrate that the nonlinear electrodynamics (NLED) description of photon propagation through the weak background intergalactic magnetic fields modifies in a fundamental way the cosmological redshift that a direct computation within a specific cosmological model can abscribe to a distant source. Independently of the class of NLED Lagrangian, the effective redshift turns out to be $1 + \tilde{z} = (1 + z) Δ$, where $Δ\equiv (1 + Φ_e)/(1 + Φ_o)$, with $Φ\equiv {8}/{3} ({L_{FF}}/{L_F}) B^2$, being $L_F = {dL}/{dF}$, $L_{FF} = {d^2L}/{dF^2}$, the field $F\equiv F_{αβ} F^{αβ}$, and $B$ the magnetic field strength. Thus the effective redshift is always much higher then the standard redshift, but recovers such limit when the NLED correction $Δ(Φ_e, Φ_o) \longrightarrow 1$. This result may provide a physical foundation for the current observation-inspired interpretation that the universe undergoes an accelerate expansion. However, under the situation analyzed here, for any NLED the actual (spatial) position of the light-emitting far-away source remains untouched.
dc.description5 pages, 3 figures, revtex4.sty
dc.identifierhttps://arxiv.org/abs/0710.5188
dc.identifierhttp://arxiv.org/abs/0710.5188
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140949
dc.subjectAstrophysics
dc.titleCosmological redshift and nonlinear electrodynamics propagation of photons from distant sources
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