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- W3105475802 abstract "We study how the constants G and Λ may vary in different theoretical models (general relativity with a perfect fluid, scalar cosmological models (“quintessence”) with and without interacting scalar and matter fields and a scalar-tensor model with a dynamical Λ) in order to explain some observational results. We apply the program outlined in section II to study three different geometries which generalize the FRW ones, which are Bianchi V, VII0 and IX, under the self-similarity hypothesis. We put special emphasis on calculating exact power-law solutions which allow us to compare the different models. In all the studied cases we arrive at the conclusion that the solutions are isotropic and noninflationary while the cosmological constant behaves as a positive decreasing time function (in agreement with the current observations) and the gravitational constant behaves as a growing time function." @default.
- W3105475802 created "2020-11-23" @default.
- W3105475802 creator A5044672461 @default.
- W3105475802 date "2011-12-14" @default.
- W3105475802 modified "2023-09-30" @default.
- W3105475802 title "(An)Isotropic models in scalar and scalar-tensor cosmologies" @default.
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- W3105475802 doi "https://doi.org/10.1007/s10509-011-0954-9" @default.
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