6533b862fe1ef96bd12c6e71

RESEARCH PRODUCT

Interacting dark energy in a closed universe

Weiqiang YangAlessandro MelchiorriSupriya PanOlga MenaEleonora Di Valentino

subject

High Energy Physics - TheoryCosmology and Nongalactic Astrophysics (astro-ph.CO)media_common.quotation_subjectCosmic background radiationFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesGeneral Relativity and Quantum CosmologyLuminositysymbols.namesakeHigh Energy Physics - Phenomenology (hep-ph)Vacuum energy0103 physical sciencesPlanckFlatness (cosmology)010303 astronomy & astrophysicsmedia_commonPhysics010308 nuclear & particles physicsAstronomy and AstrophysicsUniverseRedshiftHigh Energy Physics - PhenomenologyHigh Energy Physics - Theory (hep-th)Space and Planetary SciencesymbolsDark energyAstrophysics - Cosmology and Nongalactic Astrophysics

description

Recent measurements of the Cosmic Microwave Anisotropies power spectra measured by the Planck satellite show a preference for a closed universe at more than $99 \%$ Confidence Level. Such a scenario is however in disagreement with several low redshift observables, including luminosity distances of Type Ia Supernovae. Here we show that Interacting Dark Energy (IDE) models can ease the discrepancies between Planck and Supernovae Ia data in a closed Universe. Therefore IDE cosmologies remain as very appealing scenarios, as they can provide the solution to a number of observational tensions in different fiducial cosmologies. The results presented here strongly favour broader analyses of cosmological data, and suggest that relaxing the usual flatness and vacuum energy assumptions can lead to a much better agreement among theory and observations.

yearjournalcountryeditionlanguage
2020-10-31Monthly Notices of the Royal Astronomical Society: Letters
https://doi.org/10.1093/mnrasl/slaa207