Formation of Condensations in an Expanding World Model

  • M. I. Wanas
Part of the Astrophysics and Space Science Library book series (ASSL, volume 151)


The problem of forming inhomogeneities in an expanding world model is investigated. The world model used has been obtained [1] as a unique solution of the unperturbed field equations of the generalized field theory [2]. This model is free from particle horizons, and has the parameters (k=−l, Ωo =0.75, qo =0) The geometric structure used to construct this model is an absolute parallelism space [3].

The solution of the perturbed equations shows how condensations are formed in the model. The behaviour of matter in the model depends on its distance from the centre of perturbation. It is shown that at a certain distance S = Se from the centre, matter is stationary. If S > Se matter recedes away from the centre, while if S <Se matter falls towards the centre of perturbation. This may throw some light on the way of forming galaxies and clusters of galaxies in the Universe.


Field Theory Unique Solution Field Equation Geometric Structure Scale Structure 
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  1. [l]
    M. I. Wanas (1987) To appear in the proceedings of the 4th Asian-Pacific Regional Meeting of the IAU, held in Beijing, China 4–9 Oct. 1987.Google Scholar
  2. [2]
    F.I. Mikhail and M. I. Wanas (1977) Proc. Roy. Soc. Lond. A356, 471.MathSciNetADSGoogle Scholar
  3. [3]a
    H. P. Robertson (1932) Ann. Math. Princeton (2), 33, 496.CrossRefGoogle Scholar
  4. [3]a
    M. I. Wanas (1986) Astrophys. Space Sc. 127, 21.ADSCrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • M. I. Wanas
    • 1
  1. 1.Department of Astronomy Faculty of ScienceCairo UniversityEgypt

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