Why is the Temperature of the Universe 2.726K?

Details Why is the Temperature of the Universe 2.726K? Why is the Temperature of the Universe 2.726K?

1993-08-13

arxiv.org/abs/astro-ph/9308018v1

Science 262 (1993) 861

Astronomy and Astrophysics

Astrophysics

25 pages LaTeX 6 Figs available on requrest Fermilab-Pub-93/134-A (to appear in Science)

Scientific paper

10.1126/science.262.5135.861

NASA's Cosmic Background Explorer (COBE) Satellite has recently made the most accurate measurement of the temperature of the Universe determining it to be $2.726\pm 0.01\,$K. In trying to understand why the temperature has this value, one is led to discover the most fundamental features of the Universe---an early, radiation-dominated epoch, enormous entropy per nucleon, synthesis of the light elements around three minutes after the bang, and a small excess of matter over antimatter---as well as some of the most pressing issues in cosmology today, the development of structure in the Universe and the identification of the nature of the ubiquitous dark matter.

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