PMID: 9419320Jan 14, 1998Paper

The microwave background anisotropies: observations

Proceedings of the National Academy of Sciences of the United States of America
D Wilkinson

Abstract

Most cosmologists now believe that we live in an evolving universe that has been expanding and cooling since its origin about 15 billion years ago. Strong evidence for this standard cosmological model comes from studies of the cosmic microwave background radiation (CMBR), the remnant heat from the initial fireball. The CMBR spectrum is blackbody, as predicted from the hot Big Bang model before the discovery of the remnant radiation in 1964. In 1992 the cosmic background explorer (COBE) satellite finally detected the anisotropy of the radiation-fingerprints left by tiny temperature fluctuations in the initial bang. Careful design of the COBE satellite, and a bit of luck, allowed the 30 microK fluctuations in the CMBR temperature (2.73 K) to be pulled out of instrument noise and spurious foreground emissions. Further advances in detector technology and experiment design are allowing current CMBR experiments to search for predicted features in the anisotropy power spectrum at angular scales of 1 degrees and smaller. If they exist, these features were formed at an important epoch in the evolution of the universe--the decoupling of matter and radiation at a temperature of about 4,000 K and a time about 300,000 years after the bang. ...Continue Reading

References

Jan 14, 1998·Proceedings of the National Academy of Sciences of the United States of America·J R Bond
Nov 15, 1995·Physical Review. D·R G CrittendenN G Turok
Jul 15, 1996·Physical Review. D·G JungmanD N Spergel

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Citations

Jan 14, 1998·Proceedings of the National Academy of Sciences of the United States of America·W L Freedman
Nov 1, 2005·Bioinformatics·Xiaoyan Leng, Hans-Georg Müller

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