Cosmic shear in inflationary models of Bianchi types VIII and IX

Details Cosmic shear in inflationary models of Bianchi types VIII and IX Cosmic shear in inflationary models of Bianchi types VIII and IX

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.137..373s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 137, no. 2, Oct. 1987, p. 373-384.

Physics

12

Astronomical Models, Cosmology, Field Theory (Physics), Equations Of Motion, Vacuum

Scientific paper

Two exact solutions of Einstein's field equations of vacuum are presented and investigated. The author regards the Λ term vacuum fluid as the limiting case of scalar field with an almost constant potential. Considering the four velocity of this fluid he finds, that in both solutions there is an anisotropic expansion of the cosmic fluid, but the fluid has vanishing vorticity. The author investigates whether shear could prevent the transition into an inflationary era in these models, and the effect of shear on a scalar field is also considered. It is found that shear will speed up the rollover of the scalar field in some Bianchi type-VIII models. Possible initial conditions are discussed in light of the group structures of the models.

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