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The interaction of matter and radiation in the hot model of the Universe, II

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Abstract

Heating of the primaeval plasma prior to the epoch of recombination results in distortions in the Rayleigh-Jeans region of the microwave relic radiation spectrum (λ∼1–60 cm, or more exactly λ=2.5Ω−7/8 cm). The present observational data allow limits to be set to such energy injection from which follow upper limits to (a) the amount of antimatter in the universe; (b) the parameters of primaeval turbulence; and (c) the adiabatic fluctuation spectrum for small masses (M<1011 M ⊙).

If the heating takes place prior to the epocht=1010Ω12/5 sec (and in particular at the annihilation of electron-positron pairs atT∼108–1010 K,t<300 sec), no observable distortions are expected in the relic radiation spectrum. Here Ω=ϱ/ϱcrit is the dimensionless average density of matter in the universe.

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Authors and Affiliations

  1. Institute of Applied Mathematics, Academy of Sciences of the U.S.S.R., Moscow, USSR

    R. A. Sunyaev & Ya. B. Zeldovich

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  1. R. A. Sunyaev
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  2. Ya. B. Zeldovich
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Translated from the Russian by D. F. Smith.

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Sunyaev, R.A., Zeldovich, Y.B. The interaction of matter and radiation in the hot model of the Universe, II. Astrophys Space Sci 7, 20–30 (1970). https://doi.org/10.1007/BF00653472

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