2007/10/26 by Herman J. Mosquera Cuesta, Cuesta, Herman J. Mosquera, Jose M. Salim +3
Physics and Astronomy · #Astrophysics (astro-ph) #Astrophysics and Cosmic Phenomena #Cosmology and Gravitation Theories #FOS: Physical sciences #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.0710.5188
5 pages, 3 figures, revtex4.sty
arxiv created 2007/10/26 · openalex publication_date 2007/10/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
By-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 + z = (1 + z) Δ, where Δ≡ (1 + Φe)/(1 + Φo), with Φ≡ 8/3 (LFF/LF) B2, being LF = dL/dF, LFF = d2L/dF2, the field F≡ Fαβ Fαβ, 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(Φe, Φo) \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.