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Prog. Theor. Phys. Vol. 84 No. 3 (1990) pp. 444-451

[ Full Text PDF : FREE ACCESS (394K) ]

Remarks on Possible Backreactions of Inhomogeneities on Expanding Universes

Stefan Bildhauer

Department of Physics, Hirosaki University, Hirosaki 036

(Received March 12, 1990)

Abstract:

In the framework of a recently proposed approximation scheme for constructing inhomogeneous universes in general relativity, the backreaction of Newtonian inhomogeneities, interacting gravitationally with each other, on the averaged scale factor is considered. It is shown that, while the averaged scale factor grows faster than in a FLRW-universe with the same mean density, the expansion in the direction, where structure preferentially forms, is slower. Comparison of the resulting anisotropy of the Cosmic Microwave Background with observational data imposes upper limits on the redshift, where the evolution of density perturbations gets non-linear. Numerical values are given for a one-dimensional example.


URL : http://ptp.ipap.jp/link?PTP/84/444/
DOI : 10.1143/PTP.84.444

[ Full Text PDF : FREE ACCESS (394K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 86 No. 2 (1991) pp. 389-399 :
    A New Description for a Realistic Inhomogeneous Universe in General Relativity
    Toshifumi Futamase
  2. Progress of Theoretical Physics Vol. 86 No. 3 (1991) pp. 653-658 :
    The Relation between Peculiar Velocity and Density Parameter for a Class of Solutions in Newtonian Cosmology
    Stefan Bildhauer and Thomas Buchert
  3. Progress of Theoretical Physics Vol. 89 No. 3 (1993) pp. 581-597 :
    General Relativistic Description of a Realistic Inhomogeneous Universe
    Toshifumi Futamase

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