Current cosmological data show no statistically significant sign of an interaction between cold dark matter and dark energy, with LambdaCDM preferred, and future LSST and DESI data could constrain such a coupling at 20% precision.
New Constraints On The Dark Energy Equation of State
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abstract
We combine recent measurements of Cosmic Microwave Background Anisotropies, Supernovae luminosity distances and Baryonic Acoustic Oscillations to derive constraints on the dark energy equation of state w in the redshift range 0<z<2, using a principal components approach. We find no significant deviations from the expectations of a cosmological constant. However, combining the datasets we find slight indication for w<-1 at low redshift, thus highlighting how these datasets prefer a non-constant w. Nevertheless the cosmological constant is still in agreement with these observations, while we find that some classes of alternative models may be in tension with the inferred w(z) behaviour.
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astro-ph.CO 1years
2019 1verdicts
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Probing the independence within the dark sector in the fluid approximation
Current cosmological data show no statistically significant sign of an interaction between cold dark matter and dark energy, with LambdaCDM preferred, and future LSST and DESI data could constrain such a coupling at 20% precision.