Emergent Universe as an interaction in the dark sector
| Autor: | Emiliano Marachlian, I. E. Sánchez G., Osvaldo P. Santillán |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Nuclear and High Energy Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) General relativity media_common.quotation_subject Ciencias Físicas Dark matter General Physics and Astronomy FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology EMERGENT UNIVERSE symbols.namesake Theoretical physics Vacuum energy Friedmann–Lemaître–Robertson–Walker metric 0103 physical sciences Planck 010303 astronomy & astrophysics media_common Physics 010308 nuclear & particles physics Equation of state (cosmology) Astronomy and Astrophysics Universe Astronomía symbols Dark energy DARK ENERGY INTERACTION CIENCIAS NATURALES Y EXACTAS Astrophysics - Cosmology and Nongalactic Astrophysics |
| DOI: | 10.48550/arxiv.1508.05083 |
| Popis: | A cosmological scenario where dark matter interacts with a variable vacuum energy for a spatially flat Friedmann-Robertson-Walker space-time is proposed and analysed to show that with a linear equation of state and a particular interaction in the dark sector it is possible to get a model of an Emergent Universe. In addition, the viability of two particular models is studied by taking into account recent observations. The updated observational Hubble data and the JLA supernovae data are used in order to constraint the cosmological parameters of the models and estimate the amount of dark energy in the radiation era. It is shown that the two models fulfil the severe bounds of $\Omega_{x}(z\simeq 1100) Comment: 15 pages, 8 figures |
| Databáze: | OpenAIRE |
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