Published in 1999, Physics Reports, 310, 97.
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ABSTRACT. The Sunyaev-Zel'dovich effect causes a change in the apparent brightness of the Cosmic Microwave Background Radiation towards a cluster of galaxies or any other reservoir of hot plasma. Measurements of the effect provide distinctly different information about cluster properties than X-ray imaging data, while combining X-ray and Sunyaev-Zel'dovich effect data leads to new insights into the structures of cluster atmospheres. The effect is redshift-independent, and so provides a unique probe of the structure of the Universe on the largest scales. The present review discusses the theory of the Sunyaev-Zel'dovich effect and collects published results for many clusters, presents the overall conclusions that may be drawn from the detections so far, and discusses the prospects for future research on the Sunyaev-Zel'dovich effects.
Key Words: Sunyaev-Zel'dovich Effect; Clusters; Microwave Background
Radiation
Table of Contents
ASTROPHYSICAL CONTEXT
The Cosmic Microwave Background Radiation
Thermal history of the Universe and the CMBR
COBE and the CMBR
Clusters of galaxies and the CMBR
RADIATION BASICS
INVERSE-COMPTON SCATTERING
Single photon-electron scattering
Scattering of photons by an electron population
Effect on spectrum of radiation
The Kompaneets approximation
THE THERMAL SUNYAEV-ZEL'DOVICH EFFECT
The Sunyaev-Zel'dovich effect from clusters of
galaxies
Superclusters of galaxies
Local Sunyaev-Zel'dovich effects
THE NON-THERMAL SUNYAEV-ZEL'DOVICH EFFECT
THE KINEMATIC SUNYAEV-ZEL'DOVICH EFFECT
POLARIZATION AND THE SUNYAEV-ZEL'DOVICH EFFECT
MEASUREMENT TECHNIQUES
Single-dish radiometer measurements
Bolometric methods
Interferometric methods
SUNYAEV-ZEL'DOVICH EFFECT DATA
Cluster data
Non-thermal Sunyaev-Zel'dovich effects
THE SUNYAEV-ZEL'DOVICH EFFECTS
ANALYSED IN TERMS OF CLUSTER PROPERTIES
Cluster gas properties
Cluster velocities
THE SUNYAEV-ZEL'DOVICH EFFECT INTERPRETED IN
COSMOLOGICAL TERMS
Cosmological parameters
Contributions to the CMBR spectrum
Fluctuations in the CMBR
Quasars and the Sunyaev-Zel'dovich effects
CONTINUING RESEARCH AND THE FUTURE OF THE
SUNYAEV-ZEL'DOVICH EFFECT
REFERENCES
1 Also Smithsonian Institution Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138, USA. Back.