Astrophysics and Space Science

, Volume 161, Issue 1, pp 175–180 | Cite as

Density fluctuations in the universe after the recombination period

  • G. Lessner
Letters to the Editor


It is shown that the cosmic matter gas after the recombination period can be regarded in a very good approximation as a general relativistic Boltzmann gas in the very vicinity of equilibrium. As a consequence, spatial temperature fluctuations (ΔT/T)≊10−5 imply immense density fluctuations up to (Δp/p)≊105.


Recombination Temperature Fluctuation Density Fluctuation Spatial Temperature Cosmic Matter 


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  1. Israel, W.: 1972, in L. O'Raifeartaigh (ed.),General Relativity, Clarendon Press, Oxford.Google Scholar
  2. Lessner, G.: 1984,Astrophys. Space Sci. 100, 359.Google Scholar
  3. Stewart, J. M.: 1973,Cargèse Lectures in Physics, Vol. 6, Gordon and Breach, New York, p. 175.Google Scholar

Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • G. Lessner
    • 1
  1. 1.FB PhysikUniversität PaderbornPaderbornF.R.G.

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