Astrophysics and Space Science

, Volume 71, Issue 2, pp 363–370 | Cite as

The growth of density perturbations in Friedmann model universes with a decoupled radiation field

  • A. G. Emslie


We examine the linear growth of density perturbations in homogeneous isotropic (Friedmann) model universes, including the effect of a decoupled radiation pressure field in the modelling. Amplification factors for density perturbations in all models are derived numerically, and it is shown that the effect of radiation pressure is to decelerate the growth of such condensations, thus requiring larger inhomogeneities to be produced at radiation decoupling in order to produce protogalaxies.


Radiation Radiation Field Linear Growth Pressure Field Radiation Pressure 
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Copyright information

© D. Reidel Publishing Co 1980

Authors and Affiliations

  • A. G. Emslie
    • 1
  1. 1.Dept. of Astronomy, The UniversityGlasgowScotland, U.K.

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