Statistics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123..171l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 2, July 1983, p. 171-183.
Statistics
35
Background Radiation, Big Bang Cosmology, Hydrogen Recombinations, Lyman Spectra, Microwave Spectra, Relic Radiation, Abundance, Atomic Spectra, Black Body Radiation, Electron Transitions, Helium, Quantum Statistics, Red Shift
Scientific paper
The authors consider the effects of plasma in the presence of background radiation with a spectrum distorted from the blackbody form as a result of any energy release in the early Universe. Electron transitions are shown to occur between H and He atomic levels, producing prominent features in the relic radiation spectrum. Two groups of spectral features should form: one at recombination (z ≈ 1500), the other when the Universe becomes opaque in the Lyman lines (z ≈ 3000-5000). Detection of these features may provide information about the amount of early energy release, about the mean matter density in the Universe, and about the primordial helium abundance. It may also confirm the relic nature of the cosmic background radiation.
Lyubarsky Yu. E.
Sunyaev Rashid A.
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