Cosmological singularities and analytical solutions in varying vacuum cosmologies
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Publication Date
2018Journal Title
European Physical Journal C
ISSN
1434-6044
Publisher
Springer Science and Business Media LLC
Volume
78
Issue
8
Type
Article
Metadata
Show full item recordCitation
Basilakos, S., Paliathanasis, A., Barrow, J., & Papagiannopoulos, G. (2018). Cosmological singularities and analytical solutions in varying vacuum cosmologies. European Physical Journal C, 78 (8) https://doi.org/10.1140/epjc/s10052-018-6139-8
Abstract
We investigate the dynamical features of a large family of running vacuum cosmologies for which evolves as a polynomial in the Hubble parameter. Specifically, using the critical point analysis we study the existence and the stability of singular solutions which describe de-Sitter, radiation and matter dominated eras. We find several classes of (H) cosmologies for which new analytical solutions are given in terms of Laurent expansions. Finally, we show that the Milne universe and the R_h = ct model can be seen as perturbations around a specific (H) model, but this model is unstable.
Sponsorship
STFC
Funder references
Science and Technology Facilities Council (ST/P000673/1)
Science and Technology Facilities Council (ST/L000636/1)
Identifiers
External DOI: https://doi.org/10.1140/epjc/s10052-018-6139-8
This record's URL: https://www.repository.cam.ac.uk/handle/1810/284895
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