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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the Physical Activity for Health Group based within the School of Psychological Sciences & Health. Research here seeks to better understand how and why physical activity improves health, gain a better understanding of the amount, intensity, and type of physical activity needed for health benefits, and evaluate the effect of interventions to promote physical activity.

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A new approach to the sachs-wolfe effect

Mendonca, J.T. and Bingham, R. and Wang, Charle H.T. (2008) A new approach to the sachs-wolfe effect. Classical and Quantum Gravity, 25 (9). ISSN 0264-9381

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Abstract

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.