Emergent Universe as an interaction in the dark sector
arXiv:1508.05083 · doi:10.1142/S0217732317501528
Abstract
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 at the level of Planck.
15 pages, 8 figures
References in corpus (18)
- Planck 2015 results. XIII. Cosmological parameters
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- A History of Dark Matter
- Planck 2015 results. XIV. Dark energy and modified gravity
- First evidence of running cosmic vacuum: challenging the concordance model
- Emergent Universe with Exotic Matter
- Hints of dynamical vacuum energy in the expanding Universe
- Hubble expansion and structure formation in the "running FLRW model" of the cosmic evolution
- Cosmological constraints on a decomposed Chaplygin gas
- Evidence for interacting dark energy from BOSS
- Future CMB Constraints on Early, Cold, or Stressed Dark Energy
- Inhomogeneous vacuum energy
- Dynamical dark energy: scalar fields and running vacuum
- Emergent universe in a Jordan-Brans-Dicke theory
- Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
- Mini--Review of Dark Matter: 2012
- Emergent Universe with Interacting fluids and Generalized Second Law of Thermodynamics
- Exploring a new interaction between dark matter and dark energy using the growth rate of structure