A new approach to the Sachs-Wolfe effect

J. T. Mendonca, R. Bingham, C. H-T Wang

Research output: Contribution to journalArticlepeer-review


We present a new approach to the Sachs-Wolfe effect, which is based on the dynamics of photons in a space and time-varying gravitational field. We consider the influence of plasma dispersion effects on photon propagation, and establish the limits of validity of the usual results of the standard cosmological approach, for the large scale temperature anisotropies of the cosmic microwave background. New dynamical contributions to the integrated Sachs-Wolfe effect are also discussed.

Original languageEnglish
Article number095015
Number of pages8
JournalClassical and Quantum Gravity
Issue number9
Publication statusPublished - May 2008


  • relativistic ionization fronts
  • photon acceleration
  • microwave
  • model
  • maps


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