The Small Scale Integrated Sachs-Wolfe Effect

Details The Small Scale Integrated Sachs-Wolfe Effect The Small Scale Integrated Sachs-Wolfe Effect

1993-10-26

arxiv.org/abs/astro-ph/9310046v1

Phys.Rev.D50:627-631,1994

Astronomy and Astrophysics

Astrophysics

6 pages, compressed uuencoded postscript, CfPA-TH-93-36

Scientific paper

10.1103/PhysRevD.50.627

The integrated Sachs-Wolfe effect (ISW) can be an important factor in the generation of Cosmic Microwave Background anisotropies on all scales, especially in a reionized curvature or lambda dominated universe. We present an analytic treatment of the ISW effect, which is analogous to thick last scattering surface techniques for the Doppler effect, that compares quite well with the full numerical calculations. The power spectrum of temperature fluctuations due to the small scale ISW effect has wave number dependence k^{-5} times that of the matter power spectrum.

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