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Small scale entropy and adiabatic density perturbations — Antimatter in the Universe

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Abstract

Fluctuations of all scales are equally interesting from the point of view of the characteristics of the singular state and not only those which led to the formation of astronomical objects such as clusters of galaxies, separate galaxies, globular clusters and quasars. In this article estimates are given of the homogeneity of the overall density of hot plasma and the relation between the quantity of baryons and antibaryons at early stages of evolution of the Universe. These estimates are made for small scales, considerably smaller than the scale of the astronomical objects enumerated above. Considerations about the energy balance of hot plasma and distortions of the spectrum of relic radiation due to dissipation of density fluctuations of matter are used for these estimates. The corrected upper limit to early energy injection is given. In our preceding paper (Sunyaev and Zeldovich, 1970) this upper limit was underestimated. Difficulties with a model of the Universe which is symmetric in baryon charge are noted.

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Authors and Affiliations

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

    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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Sunyaev, R.A., Zeldovich, Y.B. Small scale entropy and adiabatic density perturbations — Antimatter in the Universe. Astrophys Space Sci 9, 368–382 (1970). https://doi.org/10.1007/BF00649577

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  • DOI: https://doi.org/10.1007/BF00649577

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