Qualitative study of perfect-fluid Friedmann-Lemaître-Robertson-Walker models with a cosmological constant
- 17 July 2012
- journal article
- Published by American Association of Physics Teachers (AAPT) in American Journal of Physics
- Vol. 80 (8) , 670-679
Abstract
The evolution of spatially homogeneous and isotropic cosmological models containing a perfect fluid with equation of state p = wρ and a cosmological constant Λ is investigated for arbitrary combinations of w and Λ, using standard qualitative analysis borrowed from classical mechanics. This approach allows one to consider a large variety of situations, appreciating similarities and differences between models, without solving the Friedmann equation, and is suitable for an elementary course in cosmology.Keywords
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