Astron. Astrophys. 321, 8-9 (1997)

The Sachs-Wolfe effect

Martin White ¹ and Wayne Hu <sup>2

1</sup> Enrico Fermi Institute, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637, USA
² Institute for Advanced Study, Princeton NJ 08540, USA

Received 19 September 1996 / Accepted 18 October 1996

Abstract

We present a pedagogical derivation of the Sachs-Wolfe effect, specifically the factor 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.

Key words: cosmic microwave background cosmology: theory

Contents

• 1. Introduction
• 2. Derivation
• 3. Isocurvature
• 4. Conclusions
• Acknowledgements
• References

© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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