The cosmic microwave background radiation temperature at a redshift of 2.34

@article{Srianand2000TheCM,
  title={The cosmic microwave background radiation temperature at a redshift of 2.34},
  author={R. Srianand and P. Petitjean and C. Ledoux},
  journal={Nature},
  year={2000},
  volume={408},
  pages={931-935}
}
The existence of the cosmic microwave background radiation is a fundamental prediction of hot Big Bang cosmology, and its temperature should increase with increasing redshift. At the present time (redshift z = 0), the temperature has been determined with high precision to be TCMBR(0) = 2.726 ± 0.010 K. In principle, the background temperature can be determined using measurements of the relative populations of atomic fine-structure levels, which are excited by the background radiation. But all… Expand

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