Annu. Rev. Astron. Astrophys. 2002. 40: 171-216
Copyright © 2002 by . All rights reserved

Reprinted with kind permission from , 4139 El Camino Way, Palo Alto, California, USA

For a PDF version of the article, click here.

COSMIC MICROWAVE BACKGROUND ANISOTROPIES

Wayne Hu 1, 2, 3 and Scott Dodelson 2, 3


1 Center for Cosmological Physics, University of Chicago, Chicago, IL 60637
2 NASA/Fermilab Astrophysics Center, P.O. Box 500, Batavia, IL 60510
3 Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637


Abstract. Cosmic microwave background (CMB) temperature anisotropies have and will continue to revolutionize our understanding of cosmology. The recent discovery of the previously predicted acoustic peaks in the power spectrum has established a working cosmological model: a critical density universe consisting of mainly dark matter and dark energy, which formed its structure through gravitational instability from quantum fluctuations during an inflationary epoch. Future observations should test this model and measure its key cosmological parameters with unprecedented precision. The phenomenology and cosmological implications of the acoustic peaks are developed in detail. Beyond the peaks, the yet to be detected secondary anisotropies and polarization present opportunities to study the physics of inflation and the dark energy. The analysis techniques devised to extract cosmological information from voluminous CMB data sets are outlined, given their increasing importance in experimental cosmology as a whole.


Keywords: background radiation, cosmology, theory, dark matter, early universe


Table of Contents

INTRODUCTION

OBSERVABLES
Standard Cosmological Paradigm
CMB Temperature Field
CMB Polarization Field

ACOUSTIC PEAKS
Basics
Initial Conditions
Gravitational Forcing
Baryon Loading
Radiation Driving
Damping
Polarization
Integral Approach
Parameter Sensitivity

BEYOND THE PEAKS
Matter Power Spectrum
Gravitational Secondaries
Scattering Secondaries
Non-Gaussianity

DATA ANALYSIS
Mapmaking
Bandpower Estimation
Cosmological Parameter Estimation

DISCUSSION

REFERENCES

Next