Exact and asymptotic solutions to tensor-scalar cosmologies

Details Exact and asymptotic solutions to tensor-scalar cosmologies Exact and asymptotic solutions to tensor-scalar cosmologies

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nuphb.486..413o&link_type=abstract

Nuclear Physics B, v. 486, p. 413-422.

Physics

Nuclear Physics

2

Scientific paper

In the tensor-scalar theory of gravity, we give a number of explicit solutions and examine analytically their asymptotic behavior. We consider homogeneous cosmologies with perfect fluid matter distribution satisfying the equation of state p = λρ where λ is a constant -1 <= λ <= 1. The convergence of our theory to general relativity is considered to be ``good'' if the scalar field φ = const. is an attractor of the equations of motion. When p = -ρ new varieties of inflation arise in which the scale factor a(t) ~ tα exp(K . tβ).

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