The Sachs-Wolfe Effect

Abstract

We present a pedagogical derivation of the Sachs-Wolfe effect, specifically the factor 1/3 relating the temperature fluctuations to gravitational potentials. The result arises from a cancellation between gravitational redshifts and intrinsic temperature fluctuations which can be derived from a coordinate transformation of the background.

2 pages, LaTeX uses laa.sty, no figures. Submitted to Astronomy & Astrophysics

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