Limits on the parameters of the equation of state for interacting dark energy

Abstract

Under the assumption that cold dark matter and dark energy interact with each other through a small coupling term, $Q$, we constrain the parameter space of the equation of state $w$ of those dark energy fields whose variation of the field since last scattering do not exceed Planck's mass. We use three parameterizations of $w$ and two different expressions for $Q$. Our work extends previous ones.

18 pages, 11 figures, accepted for publication on Physics Letters B

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• Reconstruction of the interaction term between dark matter and dark energy using SNe Ia, BAO, CMB, H(z) and X-ray gas mass fraction
• Late evolution of relic gravitational waves in coupled dark energy models
• Coupled Dark Energy field variation
• Cosmological constraints on sterile neutrino Dark Matter production mechanisms