6533b862fe1ef96bd12c6eec
RESEARCH PRODUCT
Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
Eleonora Di ValentinoAlessandro MelchiorriOlga MenaSunny Vagnozzisubject
High Energy Physics - PhenomenologyCosmology and Nongalactic Astrophysics (astro-ph.CO)High Energy Physics - Phenomenology (hep-ph)FOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)Astrophysics::Cosmology and Extragalactic AstrophysicsGeneral Relativity and Quantum CosmologyAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We examine interactions between dark matter and dark energy in light of the latest cosmological observations, focusing on a specific model with coupling proportional to the dark energy density. Our data includes Cosmic Microwave Background (CMB) measurements from the Planck 2018 legacy data release, late-time measurements of the expansion history from Baryon Acoustic Oscillations (BAO) and Supernovae Type Ia (SNeIa), galaxy clustering and cosmic shear measurements from the Dark Energy Survey Year 1 results, and the 2019 local distance ladder measurement of the Hubble constant $H_0$ from the Hubble Space Telescope. Considering Planck data both in combination with BAO or SNeIa data reduces the $H_0$ tension to a level which could possibly be compatible with a statistical fluctuation. The very same model also significantly reduces the $\Omega_{\rm m}-\sigma_8$ tension between CMB and cosmic shear measurements. Interactions between the dark sectors of our Universe remain therefore a promising joint solution to these persisting cosmological tensions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-08-12 |