Interacting dark sector with variable vacuum energy

Abstract

We examine a cosmological scenario where dark matter is coupled to a variable vacuum energy while baryons and photons are two decoupled components for a spatially flat Friedmann-Robertson-Walker spacetime. We apply the ${\chi }^2$ method to the updated observational Hubble data for constraining the cosmological parameters and analyze the amount of dark energy in the radiation era. We show that our model fulfills the severe bound of ${\Omega }_x(z\simeq 1100)<0.009$ at the $2\sigma$ level, so it is consistent with the recent analysis that includes cosmic microwave background anisotropy measurements from the Planck survey, the Atacama Cosmology Telescope, and the South Pole Telescope along with the future constraints achievable by the Euclid and CMBPol experiments, and fulfills the stringent bound ${\Omega }_x(z\simeq 10^{10})<0.04$ at the $2\sigma$ level in the big-bang nucleosynthesis epoch.

5 pages,3 figures, 2 tables. (http://prd.aps.org/abstract/PRD/v88/i8/e087301)

References in corpus (5)

• Future CMB Constraints on Early, Cold, or Stressed Dark Energy
• Testing cosmic opacity from SNe Ia and Hubble parameter through three cosmological-model-independent methods
• Dark radiation and dark matter coupled to holographic Ricci dark energy
• Dark matter, dark energy, and dark radiation coupled with a transversal interaction
• Nonbaryonic dark matter and scalar field coupled with a transversal interaction plus decoupled radiation

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