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A new approach to the Sachs–Wolfe effect

J T Mendonça1,2, R Bingham2,3 and C H-T Wang4,2

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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.


PACS

98.70.Vc Background radiations

98.80.-k Cosmology

95.30.Cq Elementary particle processes

95.30.Sf Relativity and gravitation

95.30.Qd Magnetohydrodynamics and plasmas

MSC

85A40 Cosmology (For relativistic cosmology, see 83F05)

83F05 Cosmology

Subjects

Plasma physics

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 9 (7 May 2008)

Received 6 August 2007, in final form 21 February 2008

Published 22 April 2008



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