Work

Testing dynamical vacuum models with CMB power spectrum from Planck

Year: 2019

Type: article

Abstract: The cosmic expansion is computed for various dynamical vacuum models Λ(H) and confronted to the cosmic microwave background (CMB) power spectrum from Planck. We also combined CMB in a joint analysis with other probes to place constraints on the cosmological parameters of the dynamical vacuum models. We find that all Λ(H) models are very efficient and in very good agreement with the data. Considering that the interaction term of the dark sector is given in terms of matter and radiation densities we find that the corresponding Λ(H) model shows a small but non-zero deviation from Λ cosmology, nevertheless the confidence level is close to 2.5σ.

Source: Monthly Notices of the Royal Astronomical Society

DOI: 10.1093/mnras/stz540

Authors: P Tsiapi, S Basilakos

Institutions: National Technical University of Athens, Academy of Athens, National Observatory of Athens

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Agricultural University of Athens

OpenAlex ID: W2899046763

FWCI: 2.678

Cites: 75

Cited by: 41

Related to: 10