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- W2010825786 abstract "Self-similar, spherically symmetric cosmological models with a perfect fluid and a scalar field with an exponential potential are investigated. New variables are defined which lead to a compact state space, and dynamical systems methods are utilised to analyse the models. Due to the existence of monotone functions global dynamical results can be deduced. In particular, all of the future and past attractors for these models are obtained and the global results are discussed. The essential physical results are that initially expanding models always evolve away from a massless scalar field model with an initial singularity and, depending on the parameters of the models, either recollapse to a second singularity or expand forever towards a flat power-law inflationary model. The special cases in which there is no barotropic fluid and in which the scalar field is massless are considered in more detail in order to illustrate the asymptotic results. Some phase portraits are presented and the intermediate dynamics and hence the physical properties of the models are discussed." @default.
- W2010825786 created "2016-06-24" @default.
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- W2010825786 date "2000-06-16" @default.
- W2010825786 modified "2023-10-14" @default.
- W2010825786 title "Self-similar spherically symmetric cosmological models with a perfect fluid and a scalar field" @default.
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- W2010825786 doi "https://doi.org/10.1088/0264-9381/17/13/309" @default.
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