On compatibility of the Kaluza-Klein approach with the COBE experiment

Details On compatibility of the Kaluza-Klein approach with the COBE experiment On compatibility of the Kaluza-Klein approach with the COBE experiment

1996-04-15

arxiv.org/abs/gr-qc/9604031v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

LaTeX, 9 pages, 1 Postscript figure, Extended version of the contribution to the Proceedings of the Xth Workshop on High Energ

Scientific paper

Contributions of primordial gravitational waves to the large-angular-scale anisotropies of the cosmic microwave background radiation in multidimensional cosmological models (Kaluza-Klein models) are studied. We derive limits on free parameters of the models using results of the COBE experiment and other astrophysical data. It is shown that in principle there is a room for Kaluza-Klein models as possible candidates for the description of the Early Universe. However, the obtained limits are very restrictive. Assuming that the anisotropies are mostly due to gravitational waves, none of the concrete models, analyzed in the article, satisfy them. On the other hand, if the contribution of gravitational waves is very small then a string inspired model is not ruled out.

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