The H 0 tension in light of vacuum dynamics in the universe
By J. Solà, A. Gómez-Valent, Javier de Cruz Pérez. 2017
156 citations recorded by the source corpus.
Abstract Despite the outstanding achievements of modern cosmology, the classical dispute on the precise value of H 0 , which is the first ever parameter of modern cosmology and one of the prime parameters in the field, still goes on and on after over half a century of measurements. Recently the dispute came to the spotlight with renewed strength owing to the significant tension (at > 3 σ c.l.) between the latest Planck determination obtained from the CMB anisotropies and the local (distance ladder) measurement from the Hubble Space Telescope (HST), based on Cepheids. In this work, we investigate the impact of the running vacuum model (RVM) and related models on such a controversy. For the RVM, the vacuum energy density ρ Λ carries a mild dependence on the cosmic expansion rate, i.e. ρ Λ ( H ) , which allows to ameliorate the fit quality to the overall SNIa + BAO + H ( z ) + LSS + CMB cosmological observations as compared to the concordance ΛCDM model. By letting the RVM to deviate from the vacuum option, the equation of state w = − 1 continues to be favored by the overall fit. Vacuum dynamics also predicts the following: i) the CMB range of values for H 0 is more favored than the local ones, and ii) smaller values for σ 8 ( 0 ) . As a result, a better account for the LSS structure formation data is achieved as compared to the ΛCDM, which is based on a rigid (i.e. non-dynamical) Λ term.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/c98cababd8706aea5a0ed4cf9337ea0b1a5cbce9
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In Astronomy and Astrophysics
In Nuclear and High Energy Physics
Citations in the corpus
- Cosmology Intertwined II: The Hubble Constant Tension (2020, unknown): “[67] J.”
- A Simple Phenomenological Emergent Dark Energy Model can Resolve the Hubble Tension (2019, methodology): “…the baryon acoustic oscillation (BAO) measurement at z = 2.34 from BOSS and eBOSS surveys using Lyα forest and the estimated values from Planck CMB observations assuming ΛCDM model (Sahni et al. 2014; Ding et al. 2015; Zheng et al. 2016; Solà et al. 2017; Alam et al. 2017b; Shanks et al. 2018).”