Bianchi type I cosmological models in higher dimensions

Details Bianchi type I cosmological models in higher dimensions Bianchi type I cosmological models in higher dimensions

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358...23b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, July 20, 1990, p. 23-27. Research supported by the Council for Scienti

Statistics

Computation

20

Astronomical Models, Computational Astrophysics, Cosmology, Space-Time Functions, Viscous Fluids, Einstein Equations, Entropy, Ideal Fluids

Scientific paper

In the present paper, Krori and Barua's (1987) work on Bianchi type I solutions in (9 + 1)-dimensional spacetime has been extended for viscous as well as perfect fluid in general (D + 1) dimensions. The Hubble functions are expressed in terms of the ratio (sigma-squared/theta-squared), and explicit solutions are obtained in several special cases for viscous fluid involving both bulk and shear viscosities. The perfect fluid with the equation of state p = rho is also discussed in (D + 1) dimensions and is found to have properties of dimensional reduction analogous to those in vacuum found by Krori and Barua. It is further observed that effective four-dimensional entropy would considerably increase if rapid contraction of extra dimensions takes place.

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