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- Title
Modified emergent dark energy and its astronomical constraints.
- Authors
Benaoum, H. B.; Yang, Weiqiang; Pan, Supriya; Di Valentino, Eleonora
- Abstract
In this paper, we generalize the Phenomenologically Emergent Dark Energy (PEDE) model, famous for solving the long standing Hubble tension, with our Modified Emergent Dark Energy (MEDE) scenario. This new model introduces one additional parameter ' α ' that, depending on the value assumed by the analysis, can recover Λ CDM (if α = 0), PEDE (if α = 1). We perform a robust observational analysis of MEDE using various observational datasets including cosmic microwave background (CMB) radiation, baryon acoustic oscillations (BAO) distance measurements, a local value of the Hubble constant (R19) and the Pantheon sample of Supernovae Type Ia. We find that when α is free to vary, the H 0 tension is alleviated but not solved like in PEDE, and the Λ CDM is always preferred by the data when R19 is excluded, as confirmed by the bayesian evidence analysis.
- Subjects
COSMIC background radiation; HUBBLE constant; TYPE I supernovae; BAYESIAN analysis; DARK energy
- Publication
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology, 2022, Vol 31, Issue 3, p1
- ISSN
0218-2718
- Publication type
Article
- DOI
10.1142/S0218271822500158