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NONSTATIONARY DE SITTER COSMOLOGICAL MODELS
https://doi.org/10.1142/S0218271809014807Cited by:9 (Source: Crossref)
Abstract
This paper proposes a class of nonstationary de Sitter, rotating and nonrotating, solutions to Einstein's field equations with a cosmological term of variable function Λ*(u). It is found that the space–time of the rotating nonstationary de Sitter model is algebraically special in the Petrov classification of the gravitational field with a null vector, which is a geodesic, shear-free, expanding as well as nonzero twist. However, that of the nonrotating nonstationary model is conformally flat, with nonempty space.
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